1255644480 has 224 divisors, whose sum is σ = 4313627136. Its totient is φ = 308248576.

The previous prime is 1255644479. The next prime is 1255644487. The reversal of 1255644480 is 844465521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255644487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 766222 + ... + 767858.

It is an arithmetic number, because the mean of its divisors is an integer number (19257264).

Almost surely, 2^1255644480 is an apocalyptic number.

1255644480 is a gapful number since it is divisible by the number (10) 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 1255644480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2156813568).

1255644480 is an abundant number, since it is smaller than the sum of its proper divisors (3057982656).

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

1255644480 is a wasteful number, since it uses less digits than its factorization.

1255644480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 39.

The square root of 1255644480 is about 35435.0741497743. The cubic root of 1255644480 is about 1078.8363323672.

The spelling of 1255644480 in words is "one billion, two hundred fifty-five million, six hundred forty-four thousand, four hundred eighty".