90732990 has 16 divisors (see below), whose sum is σ = 217759248. Its totient is φ = 24195456.

The previous prime is 90732989. The next prime is 90732997. The reversal of 90732990 is 9923709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90732997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512187 + ... + 1512246.

It is an arithmetic number, because the mean of its divisors is an integer number (13609953).

Almost surely, 2^90732990 is an apocalyptic number.

90732990 is an abundant number, since it is smaller than the sum of its proper divisors (127026258).

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

90732990 is a wasteful number, since it uses less digits than its factorization.

90732990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024443.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 90732990 is about 9525.3866063273. The cubic root of 90732990 is about 449.3537885174.

The spelling of 90732990 in words is "ninety million, seven hundred thirty-two thousand, nine hundred ninety".