899923428 has 36 divisors (see below), whose sum is σ = 2348190208. Its totient is φ = 290297520.

The previous prime is 899923379. The next prime is 899923439. The reversal of 899923428 is 824329998.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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, 402076 + ... + 404307.

Almost surely, 2^899923428 is an apocalyptic number.

It is an amenable number.

899923428 is an abundant number, since it is smaller than the sum of its proper divisors (1448266780).

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

899923428 is a wasteful number, since it uses less digits than its factorization.

899923428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806424 (or 806419 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 899923428 is about 29998.7237728541. The cubic root of 899923428 is about 965.4620025501.

The spelling of 899923428 in words is "eight hundred ninety-nine million, nine hundred twenty-three thousand, four hundred twenty-eight".