42990904 has 32 divisors (see below), whose sum is σ = 88210800. Its totient is φ = 19480320.

The previous prime is 42990889. The next prime is 42990911. The reversal of 42990904 is 40909924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39682 + ... + 40750.

Almost surely, 2^42990904 is an apocalyptic number.

42990904 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42990904 is an abundant number, since it is smaller than the sum of its proper divisors (45219896).

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

42990904 is a wasteful number, since it uses less digits than its factorization.

42990904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543 (or 1539 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 42990904 is about 6556.7449241220. The cubic root of 42990904 is about 350.3151012666.

The spelling of 42990904 in words is "forty-two million, nine hundred ninety thousand, nine hundred four".