256724469 has 12 divisors (see below), whose sum is σ = 370968000. Its totient is φ = 171083304.

The previous prime is 256724453. The next prime is 256724471. The reversal of 256724469 is 964427652.

256724469 is a `hidden beast` number, since 2 + 567 + 24 + 4 + 69 = 666.

It is not a de Polignac number, because 256724469 - 2⁴ = 256724453 is a prime.

It is a super-2 number, since 2×256724469² = 131814905966663922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256724869) 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, 33412 + ... + 40370.

It is an arithmetic number, because the mean of its divisors is an integer number (30914000).

Almost surely, 2^256724469 is an apocalyptic number.

It is an amenable number.

256724469 is a deficient number, since it is larger than the sum of its proper divisors (114243531).

256724469 is a wasteful number, since it uses less digits than its factorization.

256724469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11064 (or 11061 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 256724469 is about 16022.6236615605. The cubic root of 256724469 is about 635.5588268897.

The spelling of 256724469 in words is "two hundred fifty-six million, seven hundred twenty-four thousand, four hundred sixty-nine".