90021952 has 14 divisors (see below), whose sum is σ = 178637438. Its totient is φ = 45010944.

The previous prime is 90021949. The next prime is 90021973. The reversal of 90021952 is 25912009.

It can be written as a sum of positive squares in only one way, i.e., 78570496 + 11451456 = 8864^2 + 3384^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90021952.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703233 + ... + 703360.

It is an arithmetic number, because the mean of its divisors is an integer number (12759817).

Almost surely, 2^90021952 is an apocalyptic number.

It is an amenable number.

90021952 is a deficient number, since it is larger than the sum of its proper divisors (88615486).

90021952 is a wasteful number, since it uses less digits than its factorization.

90021952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406605 (or 1406595 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 90021952 is about 9487.9898819508. The cubic root of 90021952 is about 448.1769071741.

The spelling of 90021952 in words is "ninety million, twenty-one thousand, nine hundred fifty-two".