256677376 has 80 divisors (see below), whose sum is σ = 541371600. Its totient is φ = 121397248.

The previous prime is 256677361. The next prime is 256677391. The reversal of 256677376 is 673776652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256677361) and next prime (256677391).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875886 + ... + 876178.

It is an arithmetic number, because the mean of its divisors is an integer number (6767145).

Almost surely, 2^256677376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256677376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270685800).

256677376 is an abundant number, since it is smaller than the sum of its proper divisors (284694224).

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

256677376 is an equidigital number, since it uses as much as digits as its factorization.

256677376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 383 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 49.

The square root of 256677376 is about 16021.1540158629. The cubic root of 256677376 is about 635.5199626523.

The spelling of 256677376 in words is "two hundred fifty-six million, six hundred seventy-seven thousand, three hundred seventy-six".