42390808 has 32 divisors (see below), whose sum is σ = 83383200. Its totient is φ = 20176128.

The previous prime is 42390797. The next prime is 42390827. The reversal of 42390808 is 80809324.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15685 + ... + 18187.

It is an arithmetic number, because the mean of its divisors is an integer number (2605725).

Almost surely, 2^42390808 is an apocalyptic number.

It is an amenable number.

42390808 is a deficient number, since it is larger than the sum of its proper divisors (40992392).

42390808 is a wasteful number, since it uses less digits than its factorization.

42390808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611 (or 2607 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 42390808 is about 6510.8223750921. The cubic root of 42390808 is about 348.6774797287.

The spelling of 42390808 in words is "forty-two million, three hundred ninety thousand, eight hundred eight".