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40400213240 = 23510346321179
BaseRepresentation
bin100101101000000010…
…100101010011111000
310212021120010110212002
4211220002211103320
51130214423310430
630320512440132
72630104101152
oct455002452370
9125246113762
1040400213240
111615195a192
1279b5b49048
133a6ac69c2a
141d537c9ad2
1510b6bdd845
hex9680a54f8

40400213240 has 64 divisors (see below), whose sum is σ = 91985587200. Its totient is φ = 15967873152.

The previous prime is 40400213213. The next prime is 40400213327. The reversal of 40400213240 is 4231200404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1896971 + ... + 1918149.

It is an arithmetic number, because the mean of its divisors is an integer number (1437274800).

Almost surely, 240400213240 is an apocalyptic number.

40400213240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40400213240 is an abundant number, since it is smaller than the sum of its proper divisors (51585373960).

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

40400213240 is a wasteful number, since it uses less digits than its factorization.

40400213240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21756 (or 21752 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 40400213240 its reverse (4231200404), we get a palindrome (44631413644).

The spelling of 40400213240 in words is "forty billion, four hundred million, two hundred thirteen thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 20 40 103 206 412 463 515 824 926 1030 1852 2060 2315 3704 4120 4630 9260 18520 21179 42358 47689 84716 95378 105895 169432 190756 211790 238445 381512 423580 476890 847160 953780 1907560 2181437 4362874 8725748 9805877 10907185 17451496 19611754 21814370 39223508 43628740 49029385 78447016 87257480 98058770 196117540 392235080 1010005331 2020010662 4040021324 5050026655 8080042648 10100053310 20200106620 40400213240