255931380 has 192 divisors, whose sum is σ = 840672000. Its totient is φ = 64544256.

The previous prime is 255931343. The next prime is 255931421. The reversal of 255931380 is 83139552.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 923802 + ... + 924078.

It is an arithmetic number, because the mean of its divisors is an integer number (4378500).

Almost surely, 2^255931380 is an apocalyptic number.

255931380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255931380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420336000).

255931380 is an abundant number, since it is smaller than the sum of its proper divisors (584740620).

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

255931380 is a wasteful number, since it uses less digits than its factorization.

255931380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 255931380 is about 15997.8554812825. The cubic root of 255931380 is about 634.9036826653.

The spelling of 255931380 in words is "two hundred fifty-five million, nine hundred thirty-one thousand, three hundred eighty".