90487878 has 32 divisors (see below), whose sum is σ = 199051776. Its totient is φ = 27248928.

The previous prime is 90487871. The next prime is 90487883. The reversal of 90487878 is 87878409.

It is a self number, because there is not a number n which added to its sum of digits gives 90487878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90487871) 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, 8676 + ... + 16007.

It is an arithmetic number, because the mean of its divisors is an integer number (6220368).

Almost surely, 2^90487878 is an apocalyptic number.

90487878 is an abundant number, since it is smaller than the sum of its proper divisors (108563898).

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

90487878 is a wasteful number, since it uses less digits than its factorization.

90487878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24748.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 90487878 is about 9512.5116557090. The cubic root of 90487878 is about 448.9487857486.

The spelling of 90487878 in words is "ninety million, four hundred eighty-seven thousand, eight hundred seventy-eight".