256378375 has 32 divisors (see below), whose sum is σ = 351853632. Its totient is φ = 184960000.

The previous prime is 256378363. The next prime is 256378387. The reversal of 256378375 is 573873652.

It is an interprime number because it is at equal distance from previous prime (256378363) and next prime (256378387).

It is a de Polignac number, because none of the positive numbers 2^k-256378375 is a prime.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 187695 + ... + 189055.

It is an arithmetic number, because the mean of its divisors is an integer number (10995426).

Almost surely, 2^256378375 is an apocalyptic number.

256378375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256378375 is a deficient number, since it is larger than the sum of its proper divisors (95475257).

256378375 is a wasteful number, since it uses less digits than its factorization.

256378375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524 (or 1514 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 46.

The square root of 256378375 is about 16011.8198528462. The cubic root of 256378375 is about 635.2730964115.

The spelling of 256378375 in words is "two hundred fifty-six million, three hundred seventy-eight thousand, three hundred seventy-five".