90591620 has 48 divisors (see below), whose sum is σ = 228869760. Its totient is φ = 29424384.

The previous prime is 90591617. The next prime is 90591689. The reversal of 90591620 is 2619509.

It is a super-2 number, since 2×90591620² = 16413683228448800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14369 + ... + 19688.

It is an arithmetic number, because the mean of its divisors is an integer number (4768120).

Almost surely, 2^90591620 is an apocalyptic number.

It is an amenable number.

90591620 is an abundant number, since it is smaller than the sum of its proper divisors (138278140).

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

90591620 is a wasteful number, since it uses less digits than its factorization.

90591620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34092 (or 34090 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 90591620 is about 9517.9630173688. The cubic root of 90591620 is about 449.1202895947.

The spelling of 90591620 in words is "ninety million, five hundred ninety-one thousand, six hundred twenty".