90399744 has 132 divisors (see below), whose sum is σ = 276860844. Its totient is φ = 28311552.

The previous prime is 90399731. The next prime is 90399767. The reversal of 90399744 is 44799309.

It can be written as a sum of positive squares in 2 ways, for example, as 83174400 + 7225344 = 9120^2 + 2688^2 .

It is a super-2 number, since 2×90399744² = 16344227430531072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90399744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156384 + ... + 156960.

Almost surely, 2^90399744 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 90399744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138430422).

90399744 is an abundant number, since it is smaller than the sum of its proper divisors (186461100).

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

90399744 is a wasteful number, since it uses less digits than its factorization.

90399744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 90399744 is about 9507.8779966931. The cubic root of 90399744 is about 448.8029816687.

The spelling of 90399744 in words is "ninety million, three hundred ninety-nine thousand, seven hundred forty-four".