90817280 has 36 divisors (see below), whose sum is σ = 217538832. Its totient is φ = 36326400.

The previous prime is 90817273. The next prime is 90817297. The reversal of 90817280 is 8271809.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90817280.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34196 + ... + 36755.

Almost surely, 2^90817280 is an apocalyptic number.

It is an amenable number.

90817280 is an abundant number, since it is smaller than the sum of its proper divisors (126721552).

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

90817280 is an equidigital number, since it uses as much as digits as its factorization.

90817280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70972 (or 70958 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 90817280 is about 9529.8100715597. The cubic root of 90817280 is about 449.4928937759.

It can be divided in two parts, 9081 and 7280, that added together give a palindrome (16361).

The spelling of 90817280 in words is "ninety million, eight hundred seventeen thousand, two hundred eighty".