256240460 has 48 divisors (see below), whose sum is σ = 647351040. Its totient is φ = 83229120.

The previous prime is 256240423. The next prime is 256240463. The reversal of 256240460 is 64042652.

It is not an unprimeable number, because it can be changed into a prime (256240463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45506 + ... + 50825.

It is an arithmetic number, because the mean of its divisors is an integer number (13486480).

Almost surely, 2^256240460 is an apocalyptic number.

256240460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256240460 is an abundant number, since it is smaller than the sum of its proper divisors (391110580).

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

256240460 is a wasteful number, since it uses less digits than its factorization.

256240460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96366 (or 96364 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 256240460 is about 16007.5126112710. The cubic root of 256240460 is about 635.1591640203.

The spelling of 256240460 in words is "two hundred fifty-six million, two hundred forty thousand, four hundred sixty".