255860789 has 4 divisors (see below), whose sum is σ = 257728524. Its totient is φ = 253993056.

The previous prime is 255860777. The next prime is 255860791. The reversal of 255860789 is 987068552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76702564 + 179158225 = 8758^2 + 13385^2 .

It is a cyclic number.

It is not a de Polignac number, because 255860789 - 2²⁰ = 254812213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255860749) 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, 933662 + ... + 933935.

It is an arithmetic number, because the mean of its divisors is an integer number (64432131).

Almost surely, 2^255860789 is an apocalyptic number.

It is an amenable number.

255860789 is a deficient number, since it is larger than the sum of its proper divisors (1867735).

255860789 is a wasteful number, since it uses less digits than its factorization.

255860789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867734.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The square root of 255860789 is about 15995.6490646676. The cubic root of 255860789 is about 634.8453042475.

The spelling of 255860789 in words is "two hundred fifty-five million, eight hundred sixty thousand, seven hundred eighty-nine".