255977220 has 24 divisors (see below), whose sum is σ = 716736384. Its totient is φ = 68260576.

The previous prime is 255977213. The next prime is 255977221. The reversal of 255977220 is 22779552.

It is not an unprimeable number, because it can be changed into a prime (255977221) 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, 2133084 + ... + 2133203.

It is an arithmetic number, because the mean of its divisors is an integer number (29864016).

Almost surely, 2^255977220 is an apocalyptic number.

255977220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255977220 is an abundant number, since it is smaller than the sum of its proper divisors (460759164).

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

255977220 is a wasteful number, since it uses less digits than its factorization.

255977220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266299 (or 4266297 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 255977220 is about 15999.2881091629. The cubic root of 255977220 is about 634.9415863765.

The spelling of 255977220 in words is "two hundred fifty-five million, nine hundred seventy-seven thousand, two hundred twenty".