91552878 has 12 divisors (see below), whose sum is σ = 198364608. Its totient is φ = 30517620.

The previous prime is 91552861. The next prime is 91552897. The reversal of 91552878 is 87825519.

It is a happy number.

91552878 is a `hidden beast` number, since 91 + 552 + 8 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2543118 + ... + 2543153.

It is an arithmetic number, because the mean of its divisors is an integer number (16530384).

Almost surely, 2^91552878 is an apocalyptic number.

91552878 is an abundant number, since it is smaller than the sum of its proper divisors (106811730).

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

91552878 is a wasteful number, since it uses less digits than its factorization.

91552878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086279 (or 5086276 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 91552878 is about 9568.3268129804. The cubic root of 91552878 is about 450.7032264038.

The spelling of 91552878 in words is "ninety-one million, five hundred fifty-two thousand, eight hundred seventy-eight".