42921908 has 12 divisors (see below), whose sum is σ = 75287520. Its totient is φ = 21411192.

The previous prime is 42921899. The next prime is 42921913. The reversal of 42921908 is 80912924.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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, 10466 + ... + 13977.

It is an arithmetic number, because the mean of its divisors is an integer number (6273960).

Almost surely, 2^42921908 is an apocalyptic number.

It is an amenable number.

42921908 is a deficient number, since it is larger than the sum of its proper divisors (32365612).

42921908 is a wasteful number, since it uses less digits than its factorization.

42921908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24886 (or 24884 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 42921908 is about 6551.4813592042. The cubic root of 42921908 is about 350.1275942955.

The spelling of 42921908 in words is "forty-two million, nine hundred twenty-one thousand, nine hundred eight".