90306572 has 6 divisors (see below), whose sum is σ = 158036508. Its totient is φ = 45153284.

The previous prime is 90306569. The next prime is 90306581. The reversal of 90306572 is 27560309.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11288318 + ... + 11288325.

It is an arithmetic number, because the mean of its divisors is an integer number (26339418).

Almost surely, 2^90306572 is an apocalyptic number.

It is an amenable number.

90306572 is a deficient number, since it is larger than the sum of its proper divisors (67729936).

90306572 is a wasteful number, since it uses less digits than its factorization.

90306572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22576647 (or 22576645 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 90306572 is about 9502.9770072330. The cubic root of 90306572 is about 448.6487399129.

The spelling of 90306572 in words is "ninety million, three hundred six thousand, five hundred seventy-two".