90444939 has 32 divisors (see below), whose sum is σ = 135340800. Its totient is φ = 53343360.

The previous prime is 90444931. The next prime is 90444961. The reversal of 90444939 is 93944409.

It is not a de Polignac number, because 90444939 - 2³ = 90444931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90444939.

It is not an unprimeable number, because it can be changed into a prime (90444931) 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 in 31 ways as a sum of consecutive naturals, for example, 238452 + ... + 238830.

It is an arithmetic number, because the mean of its divisors is an integer number (4229400).

Almost surely, 2^90444939 is an apocalyptic number.

90444939 is a deficient number, since it is larger than the sum of its proper divisors (44895861).

90444939 is a wasteful number, since it uses less digits than its factorization.

90444939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 90444939 is about 9510.2544130007. The cubic root of 90444939 is about 448.8777616425.

The spelling of 90444939 in words is "ninety million, four hundred forty-four thousand, nine hundred thirty-nine".