78928375 has 32 divisors (see below), whose sum is σ = 104832000. Its totient is φ = 59162400.

The previous prime is 78928373. The next prime is 78928391. The reversal of 78928375 is 57382987.

It is not a de Polignac number, because 78928375 - 2¹ = 78928373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78928373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396526 + ... + 396724.

It is an arithmetic number, because the mean of its divisors is an integer number (3276000).

Almost surely, 2^78928375 is an apocalyptic number.

78928375 is a deficient number, since it is larger than the sum of its proper divisors (25903625).

78928375 is a wasteful number, since it uses less digits than its factorization.

78928375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 390 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 78928375 is about 8884.1642825873. The cubic root of 78928375 is about 428.9543277775.

The spelling of 78928375 in words is "seventy-eight million, nine hundred twenty-eight thousand, three hundred seventy-five".