90771568 has 20 divisors (see below), whose sum is σ = 186215760. Its totient is φ = 42715904.

The previous prime is 90771511. The next prime is 90771589. The reversal of 90771568 is 86517709.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166588 + ... + 167131.

It is an arithmetic number, because the mean of its divisors is an integer number (9310788).

Almost surely, 2^90771568 is an apocalyptic number.

It is an amenable number.

90771568 is an abundant number, since it is smaller than the sum of its proper divisors (95444192).

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

90771568 is a wasteful number, since it uses less digits than its factorization.

90771568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333744 (or 333738 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 90771568 is about 9527.4114007951. The cubic root of 90771568 is about 449.4174651513.

The spelling of 90771568 in words is "ninety million, seven hundred seventy-one thousand, five hundred sixty-eight".