90655878 has 32 divisors (see below), whose sum is σ = 191543040. Its totient is φ = 28524960.

The previous prime is 90655871. The next prime is 90655889. The reversal of 90655878 is 87855609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90655871) 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 15 ways as a sum of consecutive naturals, for example, 34176 + ... + 36732.

It is an arithmetic number, because the mean of its divisors is an integer number (5985720).

Almost surely, 2^90655878 is an apocalyptic number.

90655878 is an abundant number, since it is smaller than the sum of its proper divisors (100887162).

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

90655878 is a wasteful number, since it uses less digits than its factorization.

90655878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892.

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 90655878 is about 9521.3380362216. The cubic root of 90655878 is about 449.2264537584.

The spelling of 90655878 in words is "ninety million, six hundred fifty-five thousand, eight hundred seventy-eight".