256243464 has 96 divisors (see below), whose sum is σ = 708402240. Its totient is φ = 83664000.

The previous prime is 256243459. The next prime is 256243487. The reversal of 256243464 is 464342652.

256243464 is a `hidden beast` number, since 2 + 562 + 4 + 34 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1214319 + ... + 1214529.

It is an arithmetic number, because the mean of its divisors is an integer number (7379190).

Almost surely, 2^256243464 is an apocalyptic number.

256243464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256243464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354201120).

256243464 is an abundant number, since it is smaller than the sum of its proper divisors (452158776).

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

256243464 is a wasteful number, since it uses less digits than its factorization.

256243464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 484 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 256243464 is about 16007.6064419388. The cubic root of 256243464 is about 635.1616460778.

The spelling of 256243464 in words is "two hundred fifty-six million, two hundred forty-three thousand, four hundred sixty-four".