864478725 has 48 divisors (see below), whose sum is σ = 1563274944. Its totient is φ = 418048000.

The previous prime is 864478723. The next prime is 864478753. The reversal of 864478725 is 527874468.

It is not a de Polignac number, because 864478725 - 2¹ = 864478723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864478721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379189 + ... + 381461.

It is an arithmetic number, because the mean of its divisors is an integer number (32568228).

Almost surely, 2^864478725 is an apocalyptic number.

It is an amenable number.

864478725 is a deficient number, since it is larger than the sum of its proper divisors (698796219).

864478725 is a wasteful number, since it uses less digits than its factorization.

864478725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2753 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 51.

The square root of 864478725 is about 29402.0190633228. The cubic root of 864478725 is about 952.6165080925.

The spelling of 864478725 in words is "eight hundred sixty-four million, four hundred seventy-eight thousand, seven hundred twenty-five".