90057444 has 12 divisors (see below), whose sum is σ = 210134064. Its totient is φ = 30019144.

The previous prime is 90057439. The next prime is 90057463. The reversal of 90057444 is 44475009.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×90057444² = 16220686439626272, which contains 22 as substring.

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, 3752382 + ... + 3752405.

It is an arithmetic number, because the mean of its divisors is an integer number (17511172).

Almost surely, 2^90057444 is an apocalyptic number.

It is an amenable number.

90057444 is an abundant number, since it is smaller than the sum of its proper divisors (120076620).

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

90057444 is a wasteful number, since it uses less digits than its factorization.

90057444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504794 (or 7504792 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 90057444 is about 9489.8600621927. The cubic root of 90057444 is about 448.2357987535.

The spelling of 90057444 in words is "ninety million, fifty-seven thousand, four hundred forty-four".