42664432 has 20 divisors (see below), whose sum is σ = 85329856. Its totient is φ = 20643840.

The previous prime is 42664381. The next prime is 42664451. The reversal of 42664432 is 23446624.

42664432 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 42664394 and 42664403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42513 + ... + 43504.

Almost surely, 2^42664432 is an apocalyptic number.

It is an amenable number.

42664432 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42664432 is a wasteful number, since it uses less digits than its factorization.

42664432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86056 (or 86050 counting only the distinct ones).

The product of its digits is 27648, while the sum is 31.

The square root of 42664432 is about 6531.8015891483. The cubic root of 42664432 is about 349.4260852844.

The spelling of 42664432 in words is "forty-two million, six hundred sixty-four thousand, four hundred thirty-two".