899995540 has 12 divisors (see below), whose sum is σ = 1889990676. Its totient is φ = 359998208.

The previous prime is 899995519. The next prime is 899995549. The reversal of 899995540 is 45599998.

It can be written as a sum of positive squares in 2 ways, for example, as 250968964 + 649026576 = 15842^2 + 25476^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899995549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22499869 + ... + 22499908.

It is an arithmetic number, because the mean of its divisors is an integer number (157499223).

Almost surely, 2^899995540 is an apocalyptic number.

It is an amenable number.

899995540 is an abundant number, since it is smaller than the sum of its proper divisors (989995136).

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

899995540 is a wasteful number, since it uses less digits than its factorization.

899995540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44999786 (or 44999784 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 58.

The square root of 899995540 is about 29999.9256665746. The cubic root of 899995540 is about 965.4877897576.

The spelling of 899995540 in words is "eight hundred ninety-nine million, nine hundred ninety-five thousand, five hundred forty".