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40143444 = 22311227647
BaseRepresentation
bin1001100100100…
…0101001010100
32210112111110020
42121020221110
540234042234
63552225140
7665133165
oct231105124
983474406
1040143444
1120729400
121153b1b0
138416c23
14548d76c
1537ce549
hex2648a54

40143444 has 36 divisors (see below), whose sum is σ = 102961152. Its totient is φ = 12164240.

The previous prime is 40143437. The next prime is 40143451. The reversal of 40143444 is 44434104.

It is an interprime number because it is at equal distance from previous prime (40143437) and next prime (40143451).

It is a super-2 number, since 2×401434442 = 3222992192362272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12372 + ... + 15275.

It is an arithmetic number, because the mean of its divisors is an integer number (2860032).

Almost surely, 240143444 is an apocalyptic number.

40143444 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40143444 is an abundant number, since it is smaller than the sum of its proper divisors (62817708).

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

40143444 is a wasteful number, since it uses less digits than its factorization.

40143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27676 (or 27663 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 40143444 is about 6335.8854156306. The cubic root of 40143444 is about 342.4035112787.

Adding to 40143444 its reverse (44434104), we get a palindrome (84577548).

The spelling of 40143444 in words is "forty million, one hundred forty-three thousand, four hundred forty-four".

Divisors: 1 2 3 4 6 11 12 22 33 44 66 121 132 242 363 484 726 1452 27647 55294 82941 110588 165882 304117 331764 608234 912351 1216468 1824702 3345287 3649404 6690574 10035861 13381148 20071722 40143444