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40021044 = 22372292347
BaseRepresentation
bin1001100010101…
…0110000110100
32210022021112220
42120222300310
540221133134
63545442340
7664113300
oct230526064
983267486
1040021044
1120655448
12114a03b0
1383a32bb
14545ad00
1537a8149
hex262ac34

40021044 has 72 divisors (see below), whose sum is σ = 112422240. Its totient is φ = 11035584.

The previous prime is 40021021. The next prime is 40021061. The reversal of 40021044 is 44012004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15879 + ... + 18225.

It is an arithmetic number, because the mean of its divisors is an integer number (1561420).

Almost surely, 240021044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40021044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56211120).

40021044 is an abundant number, since it is smaller than the sum of its proper divisors (72401196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40021044 is a wasteful number, since it uses less digits than its factorization.

40021044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40021044 is about 6326.2187758566. The cubic root of 40021044 is about 342.0551533772.

Adding to 40021044 its reverse (44012004), we get a palindrome (84033048).

The spelling of 40021044 in words is "forty million, twenty-one thousand, forty-four".

Divisors: 1 2 3 4 6 7 12 14 21 28 29 42 49 58 84 87 98 116 147 174 196 203 294 348 406 588 609 812 1218 1421 2347 2436 2842 4263 4694 5684 7041 8526 9388 14082 16429 17052 28164 32858 49287 65716 68063 98574 115003 136126 197148 204189 230006 272252 345009 408378 460012 476441 690018 816756 952882 1380036 1429323 1905764 2858646 3335087 5717292 6670174 10005261 13340348 20010522 40021044