1244346660 has 72 divisors (see below), whose sum is σ = 3781375416. Its totient is φ = 331223040.

The previous prime is 1244346659. The next prime is 1244346661. The reversal of 1244346660 is 666434421.

It is an interprime number because it is at equal distance from previous prime (1244346659) and next prime (1244346661).

It can be written as a sum of positive squares in 4 ways, for example, as 851355684 + 392990976 = 29178^2 + 19824^2 .

It is a super-2 number, since 2×1244346660² = 3096797220506311200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1244346661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97870 + ... + 109850.

It is an arithmetic number, because the mean of its divisors is an integer number (52519103).

Almost surely, 2^1244346660 is an apocalyptic number.

1244346660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244346660 is an abundant number, since it is smaller than the sum of its proper divisors (2537028756).

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

1244346660 is a wasteful number, since it uses less digits than its factorization.

1244346660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12573 (or 12568 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 1244346660 is about 35275.2981560752. The cubic root of 1244346660 is about 1075.5909237146.

The spelling of 1244346660 in words is "one billion, two hundred forty-four million, three hundred forty-six thousand, six hundred sixty".