90897444 has 96 divisors (see below), whose sum is σ = 270681600. Its totient is φ = 26088480.

The previous prime is 90897427. The next prime is 90897467. The reversal of 90897444 is 44479809.

It is a self number, because there is not a number n which added to its sum of digits gives 90897444.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20559 + ... + 24585.

It is an arithmetic number, because the mean of its divisors is an integer number (2819600).

Almost surely, 2^90897444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90897444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135340800).

90897444 is an abundant number, since it is smaller than the sum of its proper divisors (179784156).

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

90897444 is a wasteful number, since it uses less digits than its factorization.

90897444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070 (or 4062 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 90897444 is about 9534.0151038269. The cubic root of 90897444 is about 449.6251099922.

The spelling of 90897444 in words is "ninety million, eight hundred ninety-seven thousand, four hundred forty-four".