438704688 has 40 divisors (see below), whose sum is σ = 1141609968. Its totient is φ = 145165312.

The previous prime is 438704687. The next prime is 438704731. The reversal of 438704688 is 886407834.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (438704683) 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 in 7 ways as a sum of consecutive naturals, for example, 26781 + ... + 39932.

Almost surely, 2^438704688 is an apocalyptic number.

438704688 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

438704688 is an abundant number, since it is smaller than the sum of its proper divisors (702905280).

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

438704688 is a wasteful number, since it uses less digits than its factorization.

438704688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66861 (or 66855 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The square root of 438704688 is about 20945.2784178201. The cubic root of 438704688 is about 759.8433934011.

The spelling of 438704688 in words is "four hundred thirty-eight million, seven hundred four thousand, six hundred eighty-eight".