90944840 has 64 divisors (see below), whose sum is σ = 234748800. Its totient is φ = 31062528.

The previous prime is 90944837. The next prime is 90944851. The reversal of 90944840 is 4844909.

It is a junction number, because it is equal to n+sod(n) for n = 90944794 and 90944803.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105692 + ... + 106548.

It is an arithmetic number, because the mean of its divisors is an integer number (3667950).

Almost surely, 2^90944840 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 90944840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117374400).

90944840 is an abundant number, since it is smaller than the sum of its proper divisors (143803960).

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

90944840 is a wasteful number, since it uses less digits than its factorization.

90944840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 90944840 is about 9536.5004063336. The cubic root of 90944840 is about 449.7032446751.

The spelling of 90944840 in words is "ninety million, nine hundred forty-four thousand, eight hundred forty".