90010812 has 12 divisors (see below), whose sum is σ = 210025256. Its totient is φ = 30003600.

The previous prime is 90010709. The next prime is 90010819. The reversal of 90010812 is 21801009.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90010819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3750439 + ... + 3750462.

Almost surely, 2^90010812 is an apocalyptic number.

It is an amenable number.

90010812 is an abundant number, since it is smaller than the sum of its proper divisors (120014444).

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

90010812 is a wasteful number, since it uses less digits than its factorization.

90010812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7500908 (or 7500906 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 90010812 is about 9487.4028058263. The cubic root of 90010812 is about 448.1584194735.

The spelling of 90010812 in words is "ninety million, ten thousand, eight hundred twelve".