86311620 has 36 divisors (see below), whose sum is σ = 261812460. Its totient is φ = 23016384.

The previous prime is 86311619. The next prime is 86311637. The reversal of 86311620 is 2611368.

86311620 is a `hidden beast` number, since 8 + 6 + 31 + 1 + 620 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 73822464 = 3534^2 + 8592^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239575 + ... + 239934.

Almost surely, 2^86311620 is an apocalyptic number.

It is an amenable number.

86311620 is an abundant number, since it is smaller than the sum of its proper divisors (175500840).

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

86311620 is a wasteful number, since it uses less digits than its factorization.

86311620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479524 (or 479519 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 86311620 is about 9290.4047274594. The cubic root of 86311620 is about 441.9329901212.

Adding to 86311620 its reverse (2611368), we get a palindrome (88922988).

The spelling of 86311620 in words is "eighty-six million, three hundred eleven thousand, six hundred twenty".