90617984 has 16 divisors (see below), whose sum is σ = 180528270. Its totient is φ = 45308928.

The previous prime is 90617983. The next prime is 90617987. The reversal of 90617984 is 48971609.

It can be written as a sum of positive squares in only one way, i.e., 76177984 + 14440000 = 8728^2 + 3800^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (90617981) by changing a digit.

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 as a sum of consecutive naturals, namely, 353849 + ... + 354104.

Almost surely, 2^90617984 is an apocalyptic number.

It is an amenable number.

90617984 is a deficient number, since it is larger than the sum of its proper divisors (89910286).

90617984 is an equidigital number, since it uses as much as digits as its factorization.

90617984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707967 (or 707955 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 90617984 is about 9519.3478768243. The cubic root of 90617984 is about 449.1638530754.

The spelling of 90617984 in words is "ninety million, six hundred seventeen thousand, nine hundred eighty-four".