99988400 has 30 divisors (see below), whose sum is σ = 240223092. Its totient is φ = 39995200.

The previous prime is 99988367. The next prime is 99988403. The reversal of 99988400 is 488999.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99988403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124586 + ... + 125385.

Almost surely, 2^99988400 is an apocalyptic number.

It is an amenable number.

99988400 is an abundant number, since it is smaller than the sum of its proper divisors (140234692).

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

99988400 is a wasteful number, since it uses less digits than its factorization.

99988400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249989 (or 249978 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 99988400 is about 9999.4199831790. The cubic root of 99988400 is about 464.1409351904.

The spelling of 99988400 in words is "ninety-nine million, nine hundred eighty-eight thousand, four hundred".