78972375 has 32 divisors (see below), whose sum is σ = 132200640. Its totient is φ = 41865600.

The previous prime is 78972371. The next prime is 78972389. The reversal of 78972375 is 57327987.

It is not a de Polignac number, because 78972375 - 2² = 78972371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78972371) 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, 73341 + ... + 74409.

It is an arithmetic number, because the mean of its divisors is an integer number (4131270).

Almost surely, 2^78972375 is an apocalyptic number.

78972375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78972375 is a deficient number, since it is larger than the sum of its proper divisors (53228265).

78972375 is a wasteful number, since it uses less digits than its factorization.

78972375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1274 counting only the distinct ones).

The product of its digits is 740880, while the sum is 48.

The square root of 78972375 is about 8886.6402537742. The cubic root of 78972375 is about 429.0340223288.

The spelling of 78972375 in words is "seventy-eight million, nine hundred seventy-two thousand, three hundred seventy-five".