899864 has 16 divisors (see below), whose sum is σ = 1928400. Its totient is φ = 385632.

The previous prime is 899863. The next prime is 899881. The reversal of 899864 is 468998.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 899864.

It is not an unprimeable number, because it can be changed into a prime (899863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7979 + ... + 8090.

It is an arithmetic number, because the mean of its divisors is an integer number (120525).

2⁸⁹⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

899864 is an abundant number, since it is smaller than the sum of its proper divisors (1028536).

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

899864 is a wasteful number, since it uses less digits than its factorization.

899864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16082 (or 16078 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 899864 is about 948.6116170488. The cubic root of 899864 is about 96.5440750098.

The spelling of 899864 in words is "eight hundred ninety-nine thousand, eight hundred sixty-four".