90878984 has 16 divisors (see below), whose sum is σ = 194740800. Its totient is φ = 38948112.

The previous prime is 90878981. The next prime is 90878987. The reversal of 90878984 is 48987809.

It is an interprime number because it is at equal distance from previous prime (90878981) and next prime (90878987).

It is not an unprimeable number, because it can be changed into a prime (90878981) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 811364 + ... + 811475.

It is an arithmetic number, because the mean of its divisors is an integer number (12171300).

Almost surely, 2^90878984 is an apocalyptic number.

It is an amenable number.

90878984 is an abundant number, since it is smaller than the sum of its proper divisors (103861816).

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

90878984 is a wasteful number, since it uses less digits than its factorization.

90878984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622852 (or 1622848 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 90878984 is about 9533.0469420852. The cubic root of 90878984 is about 449.5946704071.

The spelling of 90878984 in words is "ninety million, eight hundred seventy-eight thousand, nine hundred eighty-four".