99540878 has 16 divisors (see below), whose sum is σ = 153924624. Its totient is φ = 48242880.

The previous prime is 99540863. The next prime is 99540887. The reversal of 99540878 is 87804599.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18401 + ... + 23187.

It is an arithmetic number, because the mean of its divisors is an integer number (9620289).

Almost surely, 2^99540878 is an apocalyptic number.

99540878 is a deficient number, since it is larger than the sum of its proper divisors (54383746).

99540878 is a wasteful number, since it uses less digits than its factorization.

99540878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 99540878 is about 9977.0174902122. The cubic root of 99540878 is about 463.4474416032.

The spelling of 99540878 in words is "ninety-nine million, five hundred forty thousand, eight hundred seventy-eight".