90863928 has 96 divisors (see below), whose sum is σ = 261580800. Its totient is φ = 28413504.

The previous prime is 90863917. The next prime is 90863951. The reversal of 90863928 is 82936809.

90863928 is a `hidden beast` number, since 9 + 0 + 8 + 639 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173475 + ... + 173997.

It is an arithmetic number, because the mean of its divisors is an integer number (2724800).

Almost surely, 2^90863928 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 90863928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130790400).

90863928 is an abundant number, since it is smaller than the sum of its proper divisors (170716872).

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

90863928 is a wasteful number, since it uses less digits than its factorization.

90863928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 90863928 is about 9532.2572353037. The cubic root of 90863928 is about 449.5698407897.

The spelling of 90863928 in words is "ninety million, eight hundred sixty-three thousand, nine hundred twenty-eight".