439138788 has 48 divisors (see below), whose sum is σ = 1129364544. Its totient is φ = 131696640.

The previous prime is 439138769. The next prime is 439138853. The reversal of 439138788 is 887831934.

It is a super-2 number, since 2×439138788² = 385685750252217888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 439138788.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4345 + ... + 29952.

It is an arithmetic number, because the mean of its divisors is an integer number (23528428).

Almost surely, 2^439138788 is an apocalyptic number.

It is an amenable number.

439138788 is an abundant number, since it is smaller than the sum of its proper divisors (690225756).

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

439138788 is a wasteful number, since it uses less digits than its factorization.

439138788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34412 (or 34410 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 439138788 is about 20955.6385729474. The cubic root of 439138788 is about 760.0939334497.

The spelling of 439138788 in words is "four hundred thirty-nine million, one hundred thirty-eight thousand, seven hundred eighty-eight".