42931656 has 24 divisors (see below), whose sum is σ = 116273430. Its totient is φ = 14310528.

The previous prime is 42931631. The next prime is 42931703. The reversal of 42931656 is 65613924.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22410756 + 20520900 = 4734^2 + 4530^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42931656.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298065 + ... + 298208.

Almost surely, 2^42931656 is an apocalyptic number.

It is an amenable number.

42931656 is an abundant number, since it is smaller than the sum of its proper divisors (73341774).

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

42931656 is a wasteful number, since it uses less digits than its factorization.

42931656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596285 (or 596278 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 42931656 is about 6552.2252708526. The cubic root of 42931656 is about 350.1540981301.

The spelling of 42931656 in words is "forty-two million, nine hundred thirty-one thousand, six hundred fifty-six".