90021592 has 16 divisors (see below), whose sum is σ = 173352960. Its totient is φ = 43794144.

The previous prime is 90021583. The next prime is 90021599. The reversal of 90021592 is 29512009.

It is a self number, because there is not a number n which added to its sum of digits gives 90021592.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90021599) 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, 151768 + ... + 152359.

It is an arithmetic number, because the mean of its divisors is an integer number (10834560).

Almost surely, 2^90021592 is an apocalyptic number.

It is an amenable number.

90021592 is a deficient number, since it is larger than the sum of its proper divisors (83331368).

90021592 is a wasteful number, since it uses less digits than its factorization.

90021592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304170 (or 304166 counting only the distinct ones).

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

The square root of 90021592 is about 9487.9709105794. The cubic root of 90021592 is about 448.1763097499.

The spelling of 90021592 in words is "ninety million, twenty-one thousand, five hundred ninety-two".