42904864 has 12 divisors (see below), whose sum is σ = 84469014. Its totient is φ = 21452416.

The previous prime is 42904861. The next prime is 42904909. The reversal of 42904864 is 46840924.

It can be written as a sum of positive squares in only one way, i.e., 28005264 + 14899600 = 5292^2 + 3860^2 .

It is not an unprimeable number, because it can be changed into a prime (42904861) by changing a digit.

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 as a sum of consecutive naturals, namely, 670357 + ... + 670420.

Almost surely, 2^42904864 is an apocalyptic number.

It is an amenable number.

42904864 is a deficient number, since it is larger than the sum of its proper divisors (41564150).

42904864 is a wasteful number, since it uses less digits than its factorization.

42904864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340787 (or 1340779 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 42904864 is about 6550.1804555295. The cubic root of 42904864 is about 350.0812437249.

The spelling of 42904864 in words is "forty-two million, nine hundred four thousand, eight hundred sixty-four".