255720426 has 64 divisors (see below), whose sum is σ = 602090496. Its totient is φ = 71654400.

The previous prime is 255720419. The next prime is 255720461. The reversal of 255720426 is 624027552.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37996 + ... + 44216.

It is an arithmetic number, because the mean of its divisors is an integer number (9407664).

Almost surely, 2^255720426 is an apocalyptic number.

255720426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 255720426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301045248).

255720426 is an abundant number, since it is smaller than the sum of its proper divisors (346370070).

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

255720426 is a wasteful number, since it uses less digits than its factorization.

255720426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6287.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 255720426 is about 15991.2609258932. The cubic root of 255720426 is about 634.7291928111.

Adding to 255720426 its reverse (624027552), we get a palindrome (879747978).

The spelling of 255720426 in words is "two hundred fifty-five million, seven hundred twenty thousand, four hundred twenty-six".