90820656 has 40 divisors (see below), whose sum is σ = 260690160. Its totient is φ = 30273408.

The previous prime is 90820571. The next prime is 90820661. The reversal of 90820656 is 65602809.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 90820656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104685 + ... + 105548.

It is an arithmetic number, because the mean of its divisors is an integer number (6517254).

Almost surely, 2^90820656 is an apocalyptic number.

It is an amenable number.

90820656 is an abundant number, since it is smaller than the sum of its proper divisors (169869504).

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

90820656 is a wasteful number, since it uses less digits than its factorization.

90820656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210250 (or 210238 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 90820656 is about 9529.9871983125. The cubic root of 90820656 is about 449.4984634545.

The spelling of 90820656 in words is "ninety million, eight hundred twenty thousand, six hundred fifty-six".