256387377 has 8 divisors (see below), whose sum is σ = 342943264. Its totient is φ = 170378208.

The previous prime is 256387363. The next prime is 256387379. The reversal of 256387377 is 773783652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256387377 - 2¹⁰ = 256386353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256387379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135583 + ... + 137460.

It is an arithmetic number, because the mean of its divisors is an integer number (42867908).

Almost surely, 2^256387377 is an apocalyptic number.

It is an amenable number.

256387377 is a deficient number, since it is larger than the sum of its proper divisors (86555887).

256387377 is a wasteful number, since it uses less digits than its factorization.

256387377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273359.

The product of its digits is 1481760, while the sum is 48.

The square root of 256387377 is about 16012.1009552151. The cubic root of 256387377 is about 635.2805315959.

The spelling of 256387377 in words is "two hundred fifty-six million, three hundred eighty-seven thousand, three hundred seventy-seven".