1244445660 has 96 divisors (see below), whose sum is σ = 4075411200. Its totient is φ = 314383680.

The previous prime is 1244445607. The next prime is 1244445661. The reversal of 1244445660 is 665444421.

1244445660 is a `hidden beast` number, since 12 + 44 + 44 + 566 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244445661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50386 + ... + 70905.

It is an arithmetic number, because the mean of its divisors is an integer number (42452200).

Almost surely, 2^1244445660 is an apocalyptic number.

1244445660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244445660 is an abundant number, since it is smaller than the sum of its proper divisors (2830965540).

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

1244445660 is a wasteful number, since it uses less digits than its factorization.

1244445660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121328 (or 121320 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 1244445660 is about 35276.7013764042. The cubic root of 1244445660 is about 1075.6194475660.

The spelling of 1244445660 in words is "one billion, two hundred forty-four million, four hundred forty-five thousand, six hundred sixty".