438729915 has 32 divisors (see below), whose sum is σ = 760495680. Its totient is φ = 215973888.

The previous prime is 438729871. The next prime is 438729943. The reversal of 438729915 is 519927834.

It is not a de Polignac number, because 438729915 - 2⁷ = 438729787 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26299 + ... + 39611.

It is an arithmetic number, because the mean of its divisors is an integer number (23765490).

Almost surely, 2^438729915 is an apocalyptic number.

438729915 is a deficient number, since it is larger than the sum of its proper divisors (321765765).

438729915 is a wasteful number, since it uses less digits than its factorization.

438729915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13360 (or 13334 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 438729915 is about 20945.8806212582. The cubic root of 438729915 is about 759.8579576417.

The spelling of 438729915 in words is "four hundred thirty-eight million, seven hundred twenty-nine thousand, nine hundred fifteen".