1244665968 has 160 divisors (see below), whose sum is σ = 4017409536. Its totient is φ = 323288064.

The previous prime is 1244665967. The next prime is 1244665969. The reversal of 1244665968 is 8695664421.

It is an interprime number because it is at equal distance from previous prime (1244665967) and next prime (1244665969).

It is a self number, because there is not a number n which added to its sum of digits gives 1244665968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244665963) 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, 290530 + ... + 294782.

Almost surely, 2^1244665968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244665968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2008704768).

1244665968 is an abundant number, since it is smaller than the sum of its proper divisors (2772743568).

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

1244665968 is a wasteful number, since it uses less digits than its factorization.

1244665968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4351 (or 4345 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 1244665968 is about 35279.8238090839. The cubic root of 1244665968 is about 1075.6829172148.

The spelling of 1244665968 in words is "one billion, two hundred forty-four million, six hundred sixty-five thousand, nine hundred sixty-eight".