86638388 has 12 divisors (see below), whose sum is σ = 153444480. Its totient is φ = 42797112.

The previous prime is 86638369. The next prime is 86638393. The reversal of 86638388 is 88383668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130148 + ... + 130811.

It is an arithmetic number, because the mean of its divisors is an integer number (12787040).

Almost surely, 2^86638388 is an apocalyptic number.

It is an amenable number.

86638388 is a deficient number, since it is larger than the sum of its proper divisors (66806092).

86638388 is a wasteful number, since it uses less digits than its factorization.

86638388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261046 (or 261044 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 50.

The square root of 86638388 is about 9307.9744305622. The cubic root of 86638388 is about 442.4899939219.

The spelling of 86638388 in words is "eighty-six million, six hundred thirty-eight thousand, three hundred eighty-eight".