86391630 has 128 divisors (see below), whose sum is σ = 251274240. Its totient is φ = 20995200.

The previous prime is 86391619. The next prime is 86391647. The reversal of 86391630 is 3619368.

It is a happy number.

86391630 is a `hidden beast` number, since 8 + 639 + 16 + 3 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 529929 + ... + 530091.

It is an arithmetic number, because the mean of its divisors is an integer number (1963080).

Almost surely, 2^86391630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86391630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125637120).

86391630 is an abundant number, since it is smaller than the sum of its proper divisors (164882610).

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

86391630 is a wasteful number, since it uses less digits than its factorization.

86391630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 86391630 is about 9294.7097856792. The cubic root of 86391630 is about 442.0695037538.

The spelling of 86391630 in words is "eighty-six million, three hundred ninety-one thousand, six hundred thirty".