86911640 has 16 divisors (see below), whose sum is σ = 195551280. Its totient is φ = 34764640.

The previous prime is 86911639. The next prime is 86911673. The reversal of 86911640 is 4611968.

It is a self number, because there is not a number n which added to its sum of digits gives 86911640.

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, 1086356 + ... + 1086435.

It is an arithmetic number, because the mean of its divisors is an integer number (12221955).

Almost surely, 2^86911640 is an apocalyptic number.

It is an amenable number.

86911640 is an abundant number, since it is smaller than the sum of its proper divisors (108639640).

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

86911640 is a wasteful number, since it uses less digits than its factorization.

86911640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172802 (or 2172798 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 86911640 is about 9322.6412566397. The cubic root of 86911640 is about 442.9547008698.

The spelling of 86911640 in words is "eighty-six million, nine hundred eleven thousand, six hundred forty".