255787490 has 32 divisors (see below), whose sum is σ = 526829184. Its totient is φ = 87592320.

The previous prime is 255787471. The next prime is 255787501. The reversal of 255787490 is 94787552.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75125 + ... + 78455.

It is an arithmetic number, because the mean of its divisors is an integer number (16463412).

Almost surely, 2^255787490 is an apocalyptic number.

255787490 is an abundant number, since it is smaller than the sum of its proper divisors (271041694).

255787490 is a wasteful number, since it uses less digits than its factorization.

255787490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442.

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 255787490 is about 15993.3576837386. The cubic root of 255787490 is about 634.7846749622.

The spelling of 255787490 in words is "two hundred fifty-five million, seven hundred eighty-seven thousand, four hundred ninety".