865894900 has 36 divisors (see below), whose sum is σ = 2023532812. Its totient is φ = 319714560.

The previous prime is 865894891. The next prime is 865894901. The reversal of 865894900 is 9498568.

It is a happy number.

865894900 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 6 ways, for example, as 30338064 + 835556836 = 5508^2 + 28906^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865894901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331737 + ... + 334336.

Almost surely, 2^865894900 is an apocalyptic number.

It is an amenable number.

865894900 is an abundant number, since it is smaller than the sum of its proper divisors (1157637912).

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

865894900 is a wasteful number, since it uses less digits than its factorization.

865894900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666100 (or 666093 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 865894900 is about 29426.0921632486. The cubic root of 865894900 is about 953.1364112582.

The spelling of 865894900 in words is "eight hundred sixty-five million, eight hundred ninety-four thousand, nine hundred".