90212544 has 42 divisors (see below), whose sum is σ = 258579620. Its totient is φ = 30070656.

The previous prime is 90212543. The next prime is 90212561. The reversal of 90212544 is 44521209.

It is not an unprimeable number, because it can be changed into a prime (90212543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77734 + ... + 78885.

Almost surely, 2^90212544 is an apocalyptic number.

It is an amenable number.

90212544 is an abundant number, since it is smaller than the sum of its proper divisors (168367076).

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

90212544 is a wasteful number, since it uses less digits than its factorization.

90212544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156637 (or 156624 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 90212544 is about 9498.0284269947. The cubic root of 90212544 is about 448.4929734957.

The spelling of 90212544 in words is "ninety million, two hundred twelve thousand, five hundred forty-four".