256500770 has 16 divisors (see below), whose sum is σ = 461885760. Its totient is φ = 102559344.

The previous prime is 256500767. The next prime is 256500773. The reversal of 256500770 is 77005652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256500767) and next prime (256500773).

It is not an unprimeable number, because it can be changed into a prime (256500773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40691 + ... + 46569.

It is an arithmetic number, because the mean of its divisors is an integer number (28867860).

Almost surely, 2^256500770 is an apocalyptic number.

256500770 is a deficient number, since it is larger than the sum of its proper divisors (205384990).

256500770 is a wasteful number, since it uses less digits than its factorization.

256500770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 256500770 is about 16015.6414170648. The cubic root of 256500770 is about 635.3741734240.

The spelling of 256500770 in words is "two hundred fifty-six million, five hundred thousand, seven hundred seventy".