86621812 has 24 divisors (see below), whose sum is σ = 157651200. Its totient is φ = 41599680.

The previous prime is 86621809. The next prime is 86621813. The reversal of 86621812 is 21812668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86621813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14439 + ... + 19537.

It is an arithmetic number, because the mean of its divisors is an integer number (6568800).

Almost surely, 2^86621812 is an apocalyptic number.

It is an amenable number.

86621812 is a deficient number, since it is larger than the sum of its proper divisors (71029388).

86621812 is a wasteful number, since it uses less digits than its factorization.

86621812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271 (or 5269 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 86621812 is about 9307.0839686768. The cubic root of 86621812 is about 442.4617724751.

The spelling of 86621812 in words is "eighty-six million, six hundred twenty-one thousand, eight hundred twelve".