869597140 has 12 divisors (see below), whose sum is σ = 1826154036. Its totient is φ = 347838848.

The previous prime is 869597123. The next prime is 869597153. The reversal of 869597140 is 41795968.

It can be written as a sum of positive squares in 2 ways, for example, as 554037444 + 315559696 = 23538^2 + 17764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21739909 + ... + 21739948.

It is an arithmetic number, because the mean of its divisors is an integer number (152179503).

Almost surely, 2^869597140 is an apocalyptic number.

It is an amenable number.

869597140 is an abundant number, since it is smaller than the sum of its proper divisors (956556896).

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

869597140 is a wasteful number, since it uses less digits than its factorization.

869597140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43479866 (or 43479864 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 869597140 is about 29488.9325001771. The cubic root of 869597140 is about 954.4928970829.

The spelling of 869597140 in words is "eight hundred sixty-nine million, five hundred ninety-seven thousand, one hundred forty".