255176640 has 168 divisors, whose sum is σ = 883694448. Its totient is φ = 67584000.

The previous prime is 255176633. The next prime is 255176657. The reversal of 255176640 is 46671552.

It is a happy number.

255176640 is a `hidden beast` number, since 2 + 5 + 5 + 1 + 7 + 6 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 255176595 and 255176604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 722704 + ... + 723056.

It is an arithmetic number, because the mean of its divisors is an integer number (5260086).

Almost surely, 2^255176640 is an apocalyptic number.

255176640 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 255176640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441847224).

255176640 is an abundant number, since it is smaller than the sum of its proper divisors (628517808).

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

255176640 is a wasteful number, since it uses less digits than its factorization.

255176640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 255176640 is about 15974.2492781351. The cubic root of 255176640 is about 634.2789591962.

The spelling of 255176640 in words is "two hundred fifty-five million, one hundred seventy-six thousand, six hundred forty".