90878554 has 16 divisors (see below), whose sum is σ = 147288960. Its totient is φ = 41805360.

The previous prime is 90878537. The next prime is 90878587. The reversal of 90878554 is 45587809.

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, 2467 + ... + 13705.

It is an arithmetic number, because the mean of its divisors is an integer number (9205560).

Almost surely, 2^90878554 is an apocalyptic number.

90878554 is a deficient number, since it is larger than the sum of its proper divisors (56410406).

90878554 is a wasteful number, since it uses less digits than its factorization.

90878554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11565.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 90878554 is about 9533.0243889335. The cubic root of 90878554 is about 449.5939613102.

The spelling of 90878554 in words is "ninety million, eight hundred seventy-eight thousand, five hundred fifty-four".