899964 has 48 divisors (see below), whose sum is σ = 2516640. Its totient is φ = 276480.

The previous prime is 899939. The next prime is 899971. The reversal of 899964 is 469998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084 + ... + 1724.

It is an arithmetic number, because the mean of its divisors is an integer number (52430).

2⁸⁹⁹⁹⁶⁴ 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 899964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258320).

899964 is an abundant number, since it is smaller than the sum of its proper divisors (1616676).

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

899964 is a wasteful number, since it uses less digits than its factorization.

899964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 659 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 899964 is about 948.6643241948. The cubic root of 899964 is about 96.5476511242.

Adding to 899964 its sum of digits (45), we get a palindrome (900009).

It can be divided in two parts, 89996 and 4, that added together give a square (90000 = 300²).

The spelling of 899964 in words is "eight hundred ninety-nine thousand, nine hundred sixty-four".