899161236 has 36 divisors (see below), whose sum is σ = 2357063072. Its totient is φ = 299720088.

The previous prime is 899161217. The next prime is 899161267. The reversal of 899161236 is 632161998.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 899161191 and 899161200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461560 + ... + 463503.

Almost surely, 2^899161236 is an apocalyptic number.

It is an amenable number.

899161236 is an abundant number, since it is smaller than the sum of its proper divisors (1457901836).

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

899161236 is a wasteful number, since it uses less digits than its factorization.

899161236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925082 (or 925068 counting only the distinct ones).

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

The square root of 899161236 is about 29986.0173414210. The cubic root of 899161236 is about 965.1893588867.

The spelling of 899161236 in words is "eight hundred ninety-nine million, one hundred sixty-one thousand, two hundred thirty-six".