90921876 has 48 divisors (see below), whose sum is σ = 222571776. Its totient is φ = 28854144.

The previous prime is 90921869. The next prime is 90921877. The reversal of 90921876 is 67812909.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90921877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18690 + ... + 23046.

It is an arithmetic number, because the mean of its divisors is an integer number (4636912).

Almost surely, 2^90921876 is an apocalyptic number.

It is an amenable number.

90921876 is an abundant number, since it is smaller than the sum of its proper divisors (131649900).

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

90921876 is a wasteful number, since it uses less digits than its factorization.

90921876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448 (or 4446 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 90921876 is about 9535.2963247085. The cubic root of 90921876 is about 449.6653907604.

The spelling of 90921876 in words is "ninety million, nine hundred twenty-one thousand, eight hundred seventy-six".