256277740 has 12 divisors (see below), whose sum is σ = 538183296. Its totient is φ = 102511088.

The previous prime is 256277729. The next prime is 256277759. The reversal of 256277740 is 47772652.

It is a junction number, because it is equal to n+sod(n) for n = 256277693 and 256277702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6406924 + ... + 6406963.

It is an arithmetic number, because the mean of its divisors is an integer number (44848608).

Almost surely, 2^256277740 is an apocalyptic number.

256277740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256277740 is an abundant number, since it is smaller than the sum of its proper divisors (281905556).

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

256277740 is a wasteful number, since it uses less digits than its factorization.

256277740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12813896 (or 12813894 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 40.

The square root of 256277740 is about 16008.6770221652. The cubic root of 256277740 is about 635.1899652781.

The spelling of 256277740 in words is "two hundred fifty-six million, two hundred seventy-seven thousand, seven hundred forty".