899540 has 24 divisors (see below), whose sum is σ = 1936872. Its totient is φ = 350720.

The previous prime is 899537. The next prime is 899611. The reversal of 899540 is 45998.

It can be written as a sum of positive squares in 4 ways, for example, as 4624 + 894916 = 68^2 + 946^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 899540.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 899540.

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, 272 + ... + 1368.

It is an arithmetic number, because the mean of its divisors is an integer number (80703).

2⁸⁹⁹⁵⁴⁰ 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 899540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968436).

899540 is an abundant number, since it is smaller than the sum of its proper divisors (1037332).

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

899540 is a wasteful number, since it uses less digits than its factorization.

899540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 899540 is about 948.4408257767. The cubic root of 899540 is about 96.5324865789.

The spelling of 899540 in words is "eight hundred ninety-nine thousand, five hundred forty".