90577550 has 48 divisors (see below), whose sum is σ = 194050080. Its totient is φ = 30812160.

The previous prime is 90577499. The next prime is 90577561. The reversal of 90577550 is 5577509.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47006 + ... + 48894.

It is an arithmetic number, because the mean of its divisors is an integer number (4042710).

Almost surely, 2^90577550 is an apocalyptic number.

90577550 is an abundant number, since it is smaller than the sum of its proper divisors (103472530).

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

90577550 is a wasteful number, since it uses less digits than its factorization.

90577550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045 (or 2040 counting only the distinct ones).

The product of its (nonzero) digits is 55125, while the sum is 38.

The square root of 90577550 is about 9517.2238599289. The cubic root of 90577550 is about 449.0970370773.

The spelling of 90577550 in words is "ninety million, five hundred seventy-seven thousand, five hundred fifty".