90661884 has 24 divisors (see below), whose sum is σ = 223988688. Its totient is φ = 28442880.

The previous prime is 90661829. The next prime is 90661933. The reversal of 90661884 is 48816609.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222007 + ... + 222414.

It is an arithmetic number, because the mean of its divisors is an integer number (9332862).

Almost surely, 2^90661884 is an apocalyptic number.

It is an amenable number.

90661884 is an abundant number, since it is smaller than the sum of its proper divisors (133326804).

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

90661884 is a wasteful number, since it uses less digits than its factorization.

90661884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444445 (or 444443 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 90661884 is about 9521.6534278454. The cubic root of 90661884 is about 449.2363740363.

The spelling of 90661884 in words is "ninety million, six hundred sixty-one thousand, eight hundred eighty-four".