1444155560 has 64 divisors (see below), whose sum is σ = 3289038480. Its totient is φ = 570654720.

The previous prime is 1444155539. The next prime is 1444155599. The reversal of 1444155560 is 655514441.

It can be written as a sum of positive squares in 8 ways, for example, as 698756356 + 745399204 = 26434^2 + 27302^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1444155560.

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, 1251944 + ... + 1253096.

Almost surely, 2^1444155560 is an apocalyptic number.

1444155560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444155560 is an abundant number, since it is smaller than the sum of its proper divisors (1844882920).

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

1444155560 is a wasteful number, since it uses less digits than its factorization.

1444155560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 1444155560 is about 38002.0467869824. The cubic root of 1444155560 is about 1130.3284502187.

The spelling of 1444155560 in words is "one billion, four hundred forty-four million, one hundred fifty-five thousand, five hundred sixty".