78940715 has 24 divisors (see below), whose sum is σ = 114994080. Its totient is φ = 51773568.

The previous prime is 78940709. The next prime is 78940723. The reversal of 78940715 is 51704987.

It is not a de Polignac number, because 78940715 - 2¹⁶ = 78875179 is a prime.

It is a super-2 number, since 2×78940715² = 12463272969422450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1370 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (4791420).

Almost surely, 2^78940715 is an apocalyptic number.

78940715 is a deficient number, since it is larger than the sum of its proper divisors (36053365).

78940715 is a wasteful number, since it uses less digits than its factorization.

78940715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14051 (or 14044 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 78940715 is about 8884.8587495807. The cubic root of 78940715 is about 428.9766814645.

The spelling of 78940715 in words is "seventy-eight million, nine hundred forty thousand, seven hundred fifteen".