899346840 has 128 divisors (see below), whose sum is σ = 3189888000. Its totient is φ = 198471168.

The previous prime is 899346821. The next prime is 899346871. The reversal of 899346840 is 48643998.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5901 + ... + 42819.

It is an arithmetic number, because the mean of its divisors is an integer number (24921000).

Almost surely, 2^899346840 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 899346840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1594944000).

899346840 is an abundant number, since it is smaller than the sum of its proper divisors (2290541160).

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

899346840 is a wasteful number, since it uses less digits than its factorization.

899346840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36969 (or 36965 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 899346840 is about 29989.1120241997. The cubic root of 899346840 is about 965.2557654717.

The spelling of 899346840 in words is "eight hundred ninety-nine million, three hundred forty-six thousand, eight hundred forty".