90878976438 has 16 divisors (see below), whose sum is σ = 181763360256. Its totient is φ = 30292090920.

The previous prime is 90878976401. The next prime is 90878976449. The reversal of 90878976438 is 83467987809.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12483 + ... + 426513.

It is an arithmetic number, because the mean of its divisors is an integer number (11360210016).

Almost surely, 2^90878976438 is an apocalyptic number.

90878976438 is an abundant number, since it is smaller than the sum of its proper divisors (90884383818).

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

90878976438 is a wasteful number, since it uses less digits than its factorization.

90878976438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450619.

The product of its (nonzero) digits is 146313216, while the sum is 69.

The spelling of 90878976438 in words is "ninety billion, eight hundred seventy-eight million, nine hundred seventy-six thousand, four hundred thirty-eight".