899687844 has 96 divisors (see below), whose sum is σ = 2553667200. Its totient is φ = 271658880.

The previous prime is 899687813. The next prime is 899687861. The reversal of 899687844 is 448786998.

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, 375402 + ... + 377790.

It is an arithmetic number, because the mean of its divisors is an integer number (26600700).

Almost surely, 2^899687844 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 899687844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276833600).

899687844 is an abundant number, since it is smaller than the sum of its proper divisors (1653979356).

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

899687844 is a wasteful number, since it uses less digits than its factorization.

899687844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2722 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The square root of 899687844 is about 29994.7969488043. The cubic root of 899687844 is about 965.3777482519.

The spelling of 899687844 in words is "eight hundred ninety-nine million, six hundred eighty-seven thousand, eight hundred forty-four".