90651568 has 60 divisors (see below), whose sum is σ = 209142120. Its totient is φ = 37933056.

The previous prime is 90651541. The next prime is 90651623. The reversal of 90651568 is 86515609.

It is a self number, because there is not a number n which added to its sum of digits gives 90651568.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32368 + ... + 35056.

It is an arithmetic number, because the mean of its divisors is an integer number (3485702).

Almost surely, 2^90651568 is an apocalyptic number.

90651568 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90651568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104571060).

90651568 is an abundant number, since it is smaller than the sum of its proper divisors (118490552).

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

90651568 is a wasteful number, since it uses less digits than its factorization.

90651568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 90651568 is about 9521.1116997964. Note that the first 3 decimals coincide. The cubic root of 90651568 is about 449.2193345411.

It can be divided in two parts, 90651 and 568, that added together give a palindrome (91219).

The spelling of 90651568 in words is "ninety million, six hundred fifty-one thousand, five hundred sixty-eight".