256814616 has 32 divisors (see below), whose sum is σ = 649776960. Its totient is φ = 84572832.

The previous prime is 256814567. The next prime is 256814617. The reversal of 256814616 is 616418652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256814617) 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, 62470 + ... + 66453.

It is an arithmetic number, because the mean of its divisors is an integer number (20305530).

Almost surely, 2^256814616 is an apocalyptic number.

It is an amenable number.

256814616 is an abundant number, since it is smaller than the sum of its proper divisors (392962344).

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

256814616 is a wasteful number, since it uses less digits than its factorization.

256814616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129015 (or 129011 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 256814616 is about 16025.4365307158. The cubic root of 256814616 is about 635.6332088617.

The spelling of 256814616 in words is "two hundred fifty-six million, eight hundred fourteen thousand, six hundred sixteen".