90865812 has 24 divisors (see below), whose sum is σ = 212207296. Its totient is φ = 30261888.

The previous prime is 90865777. The next prime is 90865843. The reversal of 90865812 is 21856809.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14748 + ... + 19980.

Almost surely, 2^90865812 is an apocalyptic number.

It is an amenable number.

90865812 is an abundant number, since it is smaller than the sum of its proper divisors (121341484).

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

90865812 is a wasteful number, since it uses less digits than its factorization.

90865812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6687 (or 6685 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 90865812 is about 9532.3560571351. The cubic root of 90865812 is about 449.5729479403.

The spelling of 90865812 in words is "ninety million, eight hundred sixty-five thousand, eight hundred twelve".