899979400 has 48 divisors (see below), whose sum is σ = 2097187200. Its totient is φ = 359177280.

The previous prime is 899979391. The next prime is 899979427. The reversal of 899979400 is 4979998.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87741 + ... + 97459.

It is an arithmetic number, because the mean of its divisors is an integer number (43691400).

Almost surely, 2^899979400 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 899979400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048593600).

899979400 is an abundant number, since it is smaller than the sum of its proper divisors (1197207800).

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

899979400 is a wasteful number, since it uses less digits than its factorization.

899979400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10198 (or 10189 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 899979400 is about 29999.6566647020. The cubic root of 899979400 is about 965.4820182230.

The spelling of 899979400 in words is "eight hundred ninety-nine million, nine hundred seventy-nine thousand, four hundred".