899473640 has 32 divisors (see below), whose sum is σ = 2179495080. Its totient is φ = 332113152.

The previous prime is 899473591. The next prime is 899473651. The reversal of 899473640 is 46374998.

899473640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 619312996 + 280160644 = 24886^2 + 16738^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864359 + ... + 865398.

Almost surely, 2^899473640 is an apocalyptic number.

It is an amenable number.

899473640 is an abundant number, since it is smaller than the sum of its proper divisors (1280021440).

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

899473640 is a wasteful number, since it uses less digits than its factorization.

899473640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729781 (or 1729777 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 899473640 is about 29991.2260502968. The cubic root of 899473640 is about 965.3011275329.

The spelling of 899473640 in words is "eight hundred ninety-nine million, four hundred seventy-three thousand, six hundred forty".