78725115 has 60 divisors (see below), whose sum is σ = 164203776. Its totient is φ = 35979552.

The previous prime is 78725107. The next prime is 78725117. The reversal of 78725115 is 51152787.

78725115 is a `hidden beast` number, since 78 + 72 + 511 + 5 = 666.

It is not a de Polignac number, because 78725115 - 2³ = 78725107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78725115.

It is not an unprimeable number, because it can be changed into a prime (78725117) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 17862 + ... + 21828.

Almost surely, 2^78725115 is an apocalyptic number.

78725115 is an abundant number, since it is smaller than the sum of its proper divisors (85478661).

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

78725115 is a wasteful number, since it uses less digits than its factorization.

78725115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998 (or 3982 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 78725115 is about 8872.7174529566. The cubic root of 78725115 is about 428.5857902330.

The spelling of 78725115 in words is "seventy-eight million, seven hundred twenty-five thousand, one hundred fifteen".