99997808 has 40 divisors (see below), whose sum is σ = 205821648. Its totient is φ = 46902272.

The previous prime is 99997789. The next prime is 99997837. The reversal of 99997808 is 80879999.

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, 152810 + ... + 153462.

Almost surely, 2^99997808 is an apocalyptic number.

It is an amenable number.

99997808 is an abundant number, since it is smaller than the sum of its proper divisors (105823840).

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

99997808 is a wasteful number, since it uses less digits than its factorization.

99997808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 59.

The square root of 99997808 is about 9999.8903993994. The cubic root of 99997808 is about 464.1554918823.

The spelling of 99997808 in words is "ninety-nine million, nine hundred ninety-seven thousand, eight hundred eight".