255630785 has 8 divisors (see below), whose sum is σ = 324801576. Its totient is φ = 192474880.

The previous prime is 255630773. The next prime is 255630799. The reversal of 255630785 is 587036552.

It can be written as a sum of positive squares in 4 ways, for example, as 90174016 + 165456769 = 9496^2 + 12863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255630785 - 2⁶ = 255630721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1503626 + ... + 1503795.

It is an arithmetic number, because the mean of its divisors is an integer number (40600197).

Almost surely, 2^255630785 is an apocalyptic number.

It is an amenable number.

255630785 is a deficient number, since it is larger than the sum of its proper divisors (69170791).

255630785 is a wasteful number, since it uses less digits than its factorization.

255630785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007443.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 255630785 is about 15988.4578680997. The cubic root of 255630785 is about 634.6550175224.

The spelling of 255630785 in words is "two hundred fifty-five million, six hundred thirty thousand, seven hundred eighty-five".