78538625 has 16 divisors (see below), whose sum is σ = 106928640. Its totient is φ = 57118000.

The previous prime is 78538601. The next prime is 78538639. The reversal of 78538625 is 52683587.

It is not a de Polignac number, because 78538625 - 2¹² = 78534529 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27185 + ... + 29934.

It is an arithmetic number, because the mean of its divisors is an integer number (6683040).

Almost surely, 2^78538625 is an apocalyptic number.

It is an amenable number.

78538625 is a deficient number, since it is larger than the sum of its proper divisors (28390015).

78538625 is a wasteful number, since it uses less digits than its factorization.

78538625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57145 (or 57135 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The square root of 78538625 is about 8862.2020401252. The cubic root of 78538625 is about 428.2471005211.

The spelling of 78538625 in words is "seventy-eight million, five hundred thirty-eight thousand, six hundred twenty-five".