256330540 has 48 divisors (see below), whose sum is σ = 550902240. Its totient is φ = 100154880.

The previous prime is 256330513. The next prime is 256330541. The reversal of 256330540 is 45033652.

It is a junction number, because it is equal to n+sod(n) for n = 256330499 and 256330508.

It is not an unprimeable number, because it can be changed into a prime (256330541) 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, 198216 + ... + 199504.

It is an arithmetic number, because the mean of its divisors is an integer number (11477130).

Almost surely, 2^256330540 is an apocalyptic number.

256330540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256330540 is an abundant number, since it is smaller than the sum of its proper divisors (294571700).

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

256330540 is a wasteful number, since it uses less digits than its factorization.

256330540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 256330540 is about 16010.3260429012. The cubic root of 256330540 is about 635.2335842663.

The spelling of 256330540 in words is "two hundred fifty-six million, three hundred thirty thousand, five hundred forty".