255778887 has 16 divisors (see below), whose sum is σ = 419740160. Its totient is φ = 134916192.

The previous prime is 255778877. The next prime is 255778909. The reversal of 255778887 is 788877552.

It is not a de Polignac number, because 255778887 - 2⁶ = 255778823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255778807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468187 + ... + 468732.

It is an arithmetic number, because the mean of its divisors is an integer number (26233760).

Almost surely, 2^255778887 is an apocalyptic number.

255778887 is a deficient number, since it is larger than the sum of its proper divisors (163961273).

255778887 is a wasteful number, since it uses less digits than its factorization.

255778887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936942.

The product of its digits is 8780800, while the sum is 57.

The square root of 255778887 is about 15993.0887260716. The cubic root of 255778887 is about 634.7775582292. Note that the first 3 decimals are identical.

The spelling of 255778887 in words is "two hundred fifty-five million, seven hundred seventy-eight thousand, eight hundred eighty-seven".