899816 has 16 divisors (see below), whose sum is σ = 1701540. Its totient is φ = 446080.

The previous prime is 899807. The next prime is 899831. The reversal of 899816 is 618998.

It can be written as a sum of positive squares in 2 ways, for example, as 894916 + 4900 = 946^2 + 70^2 .

It is an Ulam number.

It is an unprimeable number.

899816 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686 + ... + 1506.

2⁸⁹⁹⁸¹⁶ is an apocalyptic number.

899816 is the 548-th octagonal number.

It is an amenable number.

899816 is a deficient number, since it is larger than the sum of its proper divisors (801724).

899816 is a wasteful number, since it uses less digits than its factorization.

899816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 960 counting only the distinct ones).

The product of its digits is 31104, while the sum is 41.

The square root of 899816 is about 948.5863165785. The cubic root of 899816 is about 96.5423583808.

The spelling of 899816 in words is "eight hundred ninety-nine thousand, eight hundred sixteen".