90569568 has 48 divisors (see below), whose sum is σ = 239001840. Its totient is φ = 30030336.

The previous prime is 90569551. The next prime is 90569587. The reversal of 90569568 is 86596509.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16518 + ... + 21306.

It is an arithmetic number, because the mean of its divisors is an integer number (4979205).

Almost surely, 2^90569568 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 90569568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119500920).

90569568 is an abundant number, since it is smaller than the sum of its proper divisors (148432272).

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

90569568 is a wasteful number, since it uses less digits than its factorization.

90569568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999 (or 4991 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The square root of 90569568 is about 9516.8045057151. The cubic root of 90569568 is about 449.0838447066.

The spelling of 90569568 in words is "ninety million, five hundred sixty-nine thousand, five hundred sixty-eight".