78590631 has 32 divisors (see below), whose sum is σ = 128166400. Its totient is φ = 41834880.

The previous prime is 78590623. The next prime is 78590639. The reversal of 78590631 is 13609587.

It is an interprime number because it is at equal distance from previous prime (78590623) and next prime (78590639).

It is not a de Polignac number, because 78590631 - 2³ = 78590623 is a prime.

It is a super-2 number, since 2×78590631² = 12352974561956322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78590631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78590639) 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, 22725 + ... + 25953.

It is an arithmetic number, because the mean of its divisors is an integer number (4005200).

Almost surely, 2^78590631 is an apocalyptic number.

78590631 is a deficient number, since it is larger than the sum of its proper divisors (49575769).

78590631 is a wasteful number, since it uses less digits than its factorization.

78590631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 78590631 is about 8865.1357011610. The cubic root of 78590631 is about 428.3416039356.

The spelling of 78590631 in words is "seventy-eight million, five hundred ninety thousand, six hundred thirty-one".