99987804 has 96 divisors (see below), whose sum is σ = 311897600. Its totient is φ = 27060480.

The previous prime is 99987799. The next prime is 99987817. The reversal of 99987804 is 40878999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10884 + ... + 17844.

Almost surely, 2^99987804 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 99987804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155948800).

99987804 is an abundant number, since it is smaller than the sum of its proper divisors (211909796).

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

99987804 is a wasteful number, since it uses less digits than its factorization.

99987804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000 (or 6992 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 99987804 is about 9999.3901814061. The cubic root of 99987804 is about 464.1400129883.

The spelling of 99987804 in words is "ninety-nine million, nine hundred eighty-seven thousand, eight hundred four".