99378920 has 16 divisors (see below), whose sum is σ = 223602660. Its totient is φ = 39751552.

The previous prime is 99378893. The next prime is 99378931. The reversal of 99378920 is 2987399.

It can be written as a sum of positive squares in 2 ways, for example, as 99161764 + 217156 = 9958^2 + 466^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242197 + ... + 1242276.

Almost surely, 2^99378920 is an apocalyptic number.

It is an amenable number.

99378920 is an abundant number, since it is smaller than the sum of its proper divisors (124223740).

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

99378920 is a wasteful number, since it uses less digits than its factorization.

99378920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484484 (or 2484480 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 99378920 is about 9968.8976321357. The cubic root of 99378920 is about 463.1959544173.

The spelling of 99378920 in words is "ninety-nine million, three hundred seventy-eight thousand, nine hundred twenty".