869457728 has 28 divisors (see below), whose sum is σ = 1732076292. Its totient is φ = 433029120.

The previous prime is 869457697. The next prime is 869457731. The reversal of 869457728 is 827754968.

It can be written as a sum of positive squares in 2 ways, for example, as 754710784 + 114746944 = 27472^2 + 10712^2 .

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, 9983 + ... + 42878.

Almost surely, 2^869457728 is an apocalyptic number.

It is an amenable number.

869457728 is a deficient number, since it is larger than the sum of its proper divisors (862618564).

869457728 is a wasteful number, since it uses less digits than its factorization.

869457728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53130 (or 53120 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 56.

The square root of 869457728 is about 29486.5686033489. The cubic root of 869457728 is about 954.4418869199.

The spelling of 869457728 in words is "eight hundred sixty-nine million, four hundred fifty-seven thousand, seven hundred twenty-eight".