90881724 has 12 divisors (see below), whose sum is σ = 212057384. Its totient is φ = 30293904.

The previous prime is 90881723. The next prime is 90881743. The reversal of 90881724 is 42718809.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90881723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3786727 + ... + 3786750.

Almost surely, 2^90881724 is an apocalyptic number.

It is an amenable number.

90881724 is an abundant number, since it is smaller than the sum of its proper divisors (121175660).

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

90881724 is a wasteful number, since it uses less digits than its factorization.

90881724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7573484 (or 7573482 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 90881724 is about 9533.1906516129. The cubic root of 90881724 is about 449.5991887858.

The spelling of 90881724 in words is "ninety million, eight hundred eighty-one thousand, seven hundred twenty-four".