255013440 has 448 divisors, whose sum is σ = 983162880. Its totient is φ = 55296000.

The previous prime is 255013403. The next prime is 255013487. The reversal of 255013440 is 44310552.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 255013440.

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, 6219820 + ... + 6219860.

It is an arithmetic number, because the mean of its divisors is an integer number (2194560).

Almost surely, 2^255013440 is an apocalyptic number.

255013440 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 255013440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491581440).

255013440 is an abundant number, since it is smaller than the sum of its proper divisors (728149440).

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

255013440 is a wasteful number, since it uses less digits than its factorization.

255013440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 255013440 is about 15969.1402398501. The cubic root of 255013440 is about 634.1437111817.

Adding to 255013440 its reverse (44310552), we get a palindrome (299323992).

The spelling of 255013440 in words is "two hundred fifty-five million, thirteen thousand, four hundred forty".