78976215 has 56 divisors (see below), whose sum is σ = 145430208. Its totient is φ = 41135040.

The previous prime is 78976153. The next prime is 78976223. The reversal of 78976215 is 51267987.

It is not a de Polignac number, because 78976215 - 2⁷ = 78976087 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 171085 + ... + 171545.

It is an arithmetic number, because the mean of its divisors is an integer number (2596968).

Almost surely, 2^78976215 is an apocalyptic number.

78976215 is a deficient number, since it is larger than the sum of its proper divisors (66453993).

78976215 is an equidigital number, since it uses as much as digits as its factorization.

78976215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 516 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 78976215 is about 8886.8563058035. The cubic root of 78976215 is about 429.0409760851.

The spelling of 78976215 in words is "seventy-eight million, nine hundred seventy-six thousand, two hundred fifteen".