78697086 has 16 divisors (see below), whose sum is σ = 169501584. Its totient is φ = 24214464.

The previous prime is 78697067. The next prime is 78697111. The reversal of 78697086 is 68079687.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504391 + ... + 504546.

It is an arithmetic number, because the mean of its divisors is an integer number (10593849).

Almost surely, 2^78697086 is an apocalyptic number.

78697086 is an abundant number, since it is smaller than the sum of its proper divisors (90804498).

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

78697086 is a wasteful number, since it uses less digits than its factorization.

78697086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008955.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 78697086 is about 8871.1378075194. The cubic root of 78697086 is about 428.5349201599.

The spelling of 78697086 in words is "seventy-eight million, six hundred ninety-seven thousand, eighty-six".