99807900 has 72 divisors (see below), whose sum is σ = 289814784. Its totient is φ = 26520000.

The previous prime is 99807847. The next prime is 99807913. The reversal of 99807900 is 970899.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132525 + ... + 133275.

Almost surely, 2^99807900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99807900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144907392).

99807900 is an abundant number, since it is smaller than the sum of its proper divisors (190006884).

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

99807900 is a wasteful number, since it uses less digits than its factorization.

99807900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 99807900 is about 9990.3903827628. The cubic root of 99807900 is about 463.8614764354.

The spelling of 99807900 in words is "ninety-nine million, eight hundred seven thousand, nine hundred".