90686856 has 32 divisors (see below), whose sum is σ = 244157760. Its totient is φ = 27903552.

The previous prime is 90686851. The next prime is 90686881. The reversal of 90686856 is 65868609.

It is not an unprimeable number, because it can be changed into a prime (90686851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145020 + ... + 145643.

It is an arithmetic number, because the mean of its divisors is an integer number (7629930).

Almost surely, 2^90686856 is an apocalyptic number.

It is an amenable number.

90686856 is an abundant number, since it is smaller than the sum of its proper divisors (153470904).

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

90686856 is a wasteful number, since it uses less digits than its factorization.

90686856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290685 (or 290681 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 90686856 is about 9522.9646644309. The cubic root of 90686856 is about 449.2776162887.

The spelling of 90686856 in words is "ninety million, six hundred eighty-six thousand, eight hundred fifty-six".