90072612 has 36 divisors (see below), whose sum is σ = 260210496. Its totient is φ = 25734960.

The previous prime is 90072611. The next prime is 90072617. The reversal of 90072612 is 21627009.

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

It is a super-2 number, since 2×90072612² = 16226150865005088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90072611) 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 11 ways as a sum of consecutive naturals, for example, 178464 + ... + 178967.

Almost surely, 2^90072612 is an apocalyptic number.

It is an amenable number.

90072612 is an abundant number, since it is smaller than the sum of its proper divisors (170137884).

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

90072612 is a wasteful number, since it uses less digits than its factorization.

90072612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357448 (or 357443 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 90072612 is about 9490.6591973371. The cubic root of 90072612 is about 448.2609621701.

The spelling of 90072612 in words is "ninety million, seventy-two thousand, six hundred twelve".