90215632 has 20 divisors (see below), whose sum is σ = 188238820. Its totient is φ = 41637888.

The previous prime is 90215599. The next prime is 90215633. The reversal of 90215632 is 23651209.

It can be written as a sum of positive squares in 2 ways, for example, as 11999296 + 78216336 = 3464^2 + 8844^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90215632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90215633) 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, 216657 + ... + 217072.

It is an arithmetic number, because the mean of its divisors is an integer number (9411941).

Almost surely, 2^90215632 is an apocalyptic number.

It is an amenable number.

90215632 is an abundant number, since it is smaller than the sum of its proper divisors (98023188).

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

90215632 is a wasteful number, since it uses less digits than its factorization.

90215632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433750 (or 433744 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 90215632 is about 9498.1909856562. The cubic root of 90215632 is about 448.4980907830.

The spelling of 90215632 in words is "ninety million, two hundred fifteen thousand, six hundred thirty-two".