99978286 has 16 divisors (see below), whose sum is σ = 161538048. Its totient is φ = 46272600.

The previous prime is 99978251. The next prime is 99978293. The reversal of 99978286 is 68287999.

It is a self number, because there is not a number n which added to its sum of digits gives 99978286.

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, 33630 + ... + 36481.

It is an arithmetic number, because the mean of its divisors is an integer number (10096128).

Almost surely, 2^99978286 is an apocalyptic number.

99978286 is a deficient number, since it is larger than the sum of its proper divisors (61559762).

99978286 is a wasteful number, since it uses less digits than its factorization.

99978286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70167.

The product of its digits is 3919104, while the sum is 58.

The square root of 99978286 is about 9998.9142410564. The cubic root of 99978286 is about 464.1252851093.

The spelling of 99978286 in words is "ninety-nine million, nine hundred seventy-eight thousand, two hundred eighty-six".