899444400 has 120 divisors (see below), whose sum is σ = 2887981824. Its totient is φ = 239289600.

The previous prime is 899444389. The next prime is 899444407. The reversal of 899444400 is 4444998.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (899444407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 871885 + ... + 872915.

Almost surely, 2^899444400 is an apocalyptic number.

899444400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 899444400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1443990912).

899444400 is an abundant number, since it is smaller than the sum of its proper divisors (1988537424).

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

899444400 is a wasteful number, since it uses less digits than its factorization.

899444400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 899444400 is about 29990.7385704320. The cubic root of 899444400 is about 965.2906674484.

The spelling of 899444400 in words is "eight hundred ninety-nine million, four hundred forty-four thousand, four hundred".