78861875 has 40 divisors (see below), whose sum is σ = 107778000. Its totient is φ = 57456000.

The previous prime is 78861859. The next prime is 78861899. The reversal of 78861875 is 57816887.

It is not a de Polignac number, because 78861875 - 2⁴ = 78861859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 344261 + ... + 344489.

It is an arithmetic number, because the mean of its divisors is an integer number (2694450).

Almost surely, 2^78861875 is an apocalyptic number.

78861875 is a deficient number, since it is larger than the sum of its proper divisors (28916125).

78861875 is a wasteful number, since it uses less digits than its factorization.

78861875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 282 counting only the distinct ones).

The product of its digits is 752640, while the sum is 50.

The square root of 78861875 is about 8880.4208796656. The cubic root of 78861875 is about 428.8338241023.

The spelling of 78861875 in words is "seventy-eight million, eight hundred sixty-one thousand, eight hundred seventy-five".