42656772 has 12 divisors (see below), whose sum is σ = 99532496. Its totient is φ = 14218920.

The previous prime is 42656753. The next prime is 42656773. The reversal of 42656772 is 27765624.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 42656772.

It is not an unprimeable number, because it can be changed into a prime (42656773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777354 + ... + 1777377.

Almost surely, 2^42656772 is an apocalyptic number.

It is an amenable number.

42656772 is an abundant number, since it is smaller than the sum of its proper divisors (56875724).

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

42656772 is a wasteful number, since it uses less digits than its factorization.

42656772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554738 (or 3554736 counting only the distinct ones).

The product of its digits is 141120, while the sum is 39.

The square root of 42656772 is about 6531.2152008642. The cubic root of 42656772 is about 349.4051719702.

The spelling of 42656772 in words is "forty-two million, six hundred fifty-six thousand, seven hundred seventy-two".