90105912 has 64 divisors (see below), whose sum is σ = 269556000. Its totient is φ = 27724032.

The previous prime is 90105907. The next prime is 90105931. The reversal of 90105912 is 21950109.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13237 + ... + 18852.

Almost surely, 2^90105912 is an apocalyptic number.

It is an amenable number.

90105912 is an abundant number, since it is smaller than the sum of its proper divisors (179450088).

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

90105912 is a wasteful number, since it uses less digits than its factorization.

90105912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32117 (or 32107 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 90105912 is about 9492.4133917566. The cubic root of 90105912 is about 448.3161963142.

The spelling of 90105912 in words is "ninety million, one hundred five thousand, nine hundred twelve".