255381780 has 48 divisors (see below), whose sum is σ = 715942080. Its totient is φ = 68018688.

The previous prime is 255381779. The next prime is 255381809. The reversal of 255381780 is 87183552.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 59052 + ... + 63228.

It is an arithmetic number, because the mean of its divisors is an integer number (14915460).

Almost surely, 2^255381780 is an apocalyptic number.

255381780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255381780 is an abundant number, since it is smaller than the sum of its proper divisors (460560300).

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

255381780 is a wasteful number, since it uses less digits than its factorization.

255381780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208 (or 5206 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 255381780 is about 15980.6689471999. The cubic root of 255381780 is about 634.4488821875.

The spelling of 255381780 in words is "two hundred fifty-five million, three hundred eighty-one thousand, seven hundred eighty".