869477728 has 24 divisors (see below), whose sum is σ = 1956325392. Its totient is φ = 372633216.

The previous prime is 869477723. The next prime is 869477747. The reversal of 869477728 is 827774968.

869477728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869477723) 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, 1940575 + ... + 1941022.

It is an arithmetic number, because the mean of its divisors is an integer number (81513558).

Almost surely, 2^869477728 is an apocalyptic number.

It is an amenable number.

869477728 is an abundant number, since it is smaller than the sum of its proper divisors (1086847664).

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

869477728 is a wasteful number, since it uses less digits than its factorization.

869477728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881614 (or 3881606 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 58.

The square root of 869477728 is about 29486.9077388593. The cubic root of 869477728 is about 954.4492051562.

The spelling of 869477728 in words is "eight hundred sixty-nine million, four hundred seventy-seven thousand, seven hundred twenty-eight".