90805080 has 32 divisors (see below), whose sum is σ = 272415600. Its totient is φ = 24214656.

The previous prime is 90805079. The next prime is 90805097. The reversal of 90805080 is 8050809.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 7 ways as a sum of consecutive naturals, for example, 378235 + ... + 378474.

Almost surely, 2^90805080 is an apocalyptic number.

It is an amenable number.

90805080 is an abundant number, since it is smaller than the sum of its proper divisors (181610520).

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

90805080 is a wasteful number, since it uses less digits than its factorization.

90805080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756723 (or 756719 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 90805080 is about 9529.1699533590. The cubic root of 90805080 is about 449.4727652317.

Adding to 90805080 its reverse (8050809), we get a palindrome (98855889).

The spelling of 90805080 in words is "ninety million, eight hundred five thousand, eighty".