899819640 has 96 divisors (see below), whose sum is σ = 3018787200. Its totient is φ = 232208640.

The previous prime is 899819633. The next prime is 899819647. The reversal of 899819640 is 46918998.

It is an interprime number because it is at equal distance from previous prime (899819633) and next prime (899819647).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899819647) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 29155 + ... + 51474.

It is an arithmetic number, because the mean of its divisors is an integer number (31445700).

Almost surely, 2^899819640 is an apocalyptic number.

It is an amenable number.

899819640 is an abundant number, since it is smaller than the sum of its proper divisors (2118967560).

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

899819640 is a wasteful number, since it uses less digits than its factorization.

899819640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80677 (or 80670 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 899819640 is about 29996.9938493843. The cubic root of 899819640 is about 965.4248856060.

The spelling of 899819640 in words is "eight hundred ninety-nine million, eight hundred nineteen thousand, six hundred forty".