438659816 has 32 divisors (see below), whose sum is σ = 940688640. Its totient is φ = 187856448.

The previous prime is 438659807. The next prime is 438659831. The reversal of 438659816 is 618956834.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 113630 + ... + 117426.

It is an arithmetic number, because the mean of its divisors is an integer number (29396520).

Almost surely, 2^438659816 is an apocalyptic number.

It is an amenable number.

438659816 is an abundant number, since it is smaller than the sum of its proper divisors (502028824).

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

438659816 is a wasteful number, since it uses less digits than its factorization.

438659816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5873 (or 5869 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 438659816 is about 20944.2072182262. The cubic root of 438659816 is about 759.8174861821.

The spelling of 438659816 in words is "four hundred thirty-eight million, six hundred fifty-nine thousand, eight hundred sixteen".