99400900 has 27 divisors (see below), whose sum is σ = 215916519. Its totient is φ = 39720480.

The previous prime is 99400897. The next prime is 99400901. The reversal of 99400900 is 900499.

The square root of 99400900 is 9970.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6625476 + 92775424 = 2574^2 + 9632^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99400901) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 99202 + ... + 100198.

Almost surely, 2^99400900 is an apocalyptic number.

99400900 is the 9970-th square number.

It is an amenable number.

99400900 is an abundant number, since it is smaller than the sum of its proper divisors (116515619).

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

99400900 is an equidigital number, since it uses as much as digits as its factorization.

99400900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The cubic root of 99400900 is about 463.2301008157.

Multiplying 99400900 by its product of nonzero digits (2916), we get a square (289853024400 = 538380²).

The spelling of 99400900 in words is "ninety-nine million, four hundred thousand, nine hundred".