42644856 has 32 divisors (see below), whose sum is σ = 108363600. Its totient is φ = 13981440.

The previous prime is 42644837. The next prime is 42644869. The reversal of 42644856 is 65844624.

42644856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13101 + ... + 16028.

Almost surely, 2^42644856 is an apocalyptic number.

It is an amenable number.

42644856 is an abundant number, since it is smaller than the sum of its proper divisors (65718744).

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

42644856 is a wasteful number, since it uses less digits than its factorization.

42644856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29199 (or 29195 counting only the distinct ones).

The product of its digits is 184320, while the sum is 39.

The square root of 42644856 is about 6530.3029026225. The cubic root of 42644856 is about 349.3726339575.

The spelling of 42644856 in words is "forty-two million, six hundred forty-four thousand, eight hundred fifty-six".