90805392 has 30 divisors (see below), whose sum is σ = 254129382. Its totient is φ = 30268416.

The previous prime is 90805387. The next prime is 90805433. The reversal of 90805392 is 29350809.

It can be written as a sum of positive squares in only one way, i.e., 53056656 + 37748736 = 7284^2 + 6144^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 5 ways as a sum of consecutive naturals, for example, 315153 + ... + 315440.

Almost surely, 2^90805392 is an apocalyptic number.

It is an amenable number.

90805392 is an abundant number, since it is smaller than the sum of its proper divisors (163323990).

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

90805392 is a wasteful number, since it uses less digits than its factorization.

90805392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630607 (or 630598 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 90805392 is about 9529.1863241307. The cubic root of 90805392 is about 449.4732800170.

The spelling of 90805392 in words is "ninety million, eight hundred five thousand, three hundred ninety-two".