256880983 has 4 divisors (see below), whose sum is σ = 261727848. Its totient is φ = 252034120.

The previous prime is 256880971. The next prime is 256880989. The reversal of 256880983 is 389088652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256880983 - 2²¹ = 254783831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256880989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2423353 + ... + 2423458.

It is an arithmetic number, because the mean of its divisors is an integer number (65431962).

Almost surely, 2^256880983 is an apocalyptic number.

256880983 is a deficient number, since it is larger than the sum of its proper divisors (4846865).

256880983 is an equidigital number, since it uses as much as digits as its factorization.

256880983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846864.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 256880983 is about 16027.5070737779. The cubic root of 256880983 is about 635.6879583881.

The spelling of 256880983 in words is "two hundred fifty-six million, eight hundred eighty thousand, nine hundred eighty-three".