438820403688 has 80 divisors (see below), whose sum is σ = 1247448396480. Its totient is φ = 144090267552.

The previous prime is 438820403677. The next prime is 438820403719. The reversal of 438820403688 is 886304028834.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5010256 + ... + 5097087.

It is an arithmetic number, because the mean of its divisors is an integer number (15593104956).

Almost surely, 2^438820403688 is an apocalyptic number.

It is an amenable number.

438820403688 is an abundant number, since it is smaller than the sum of its proper divisors (808627992792).

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

438820403688 is a wasteful number, since it uses less digits than its factorization.

438820403688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10107428 (or 10107415 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 54.

The spelling of 438820403688 in words is "four hundred thirty-eight billion, eight hundred twenty million, four hundred three thousand, six hundred eighty-eight".