899399564 has 12 divisors (see below), whose sum is σ = 1798799184. Its totient is φ = 385456944.

The previous prime is 899399563. The next prime is 899399573. The reversal of 899399564 is 465993998.

899399564 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 899399497 and 899399506.

It is not an unprimeable number, because it can be changed into a prime (899399563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16060679 + ... + 16060734.

It is an arithmetic number, because the mean of its divisors is an integer number (149899932).

Almost surely, 2^899399564 is an apocalyptic number.

It is an amenable number.

899399564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

899399564 is a wasteful number, since it uses less digits than its factorization.

899399564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32121424 (or 32121422 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 62.

The square root of 899399564 is about 29989.9910636866. The cubic root of 899399564 is about 965.2746277349.

The spelling of 899399564 in words is "eight hundred ninety-nine million, three hundred ninety-nine thousand, five hundred sixty-four".