90912012 has 24 divisors (see below), whose sum is σ = 212357376. Its totient is φ = 30271248.

The previous prime is 90912011. The next prime is 90912037. The reversal of 90912012 is 21021909.

It is not an unprimeable number, because it can be changed into a prime (90912011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9193 + ... + 16319.

It is an arithmetic number, because the mean of its divisors is an integer number (8848224).

Almost surely, 2^90912012 is an apocalyptic number.

It is an amenable number.

90912012 is an abundant number, since it is smaller than the sum of its proper divisors (121445364).

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

90912012 is a wasteful number, since it uses less digits than its factorization.

90912012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8197 (or 8195 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 90912012 is about 9534.7790745250. The cubic root of 90912012 is about 449.6491289614.

It can be divided in two parts, 909 and 12012, that added together give a palindrome (12921).

The spelling of 90912012 in words is "ninety million, nine hundred twelve thousand, twelve".