1244689849 has 8 divisors (see below), whose sum is σ = 1373129352. Its totient is φ = 1120920960.

The previous prime is 1244689769. The next prime is 1244689907. The reversal of 1244689849 is 9489864421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58369600 + 1186320249 = 7640^2 + 34443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244689849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1244689849.

It is not an unprimeable number, because it can be changed into a prime (1244689049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167094 + ... + 1168159.

It is an arithmetic number, because the mean of its divisors is an integer number (171641169).

Almost surely, 2^1244689849 is an apocalyptic number.

It is an amenable number.

1244689849 is a deficient number, since it is larger than the sum of its proper divisors (128439503).

1244689849 is a wasteful number, since it uses less digits than its factorization.

1244689849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335307.

The product of its digits is 3981312, while the sum is 55.

The square root of 1244689849 is about 35280.1622586972. The cubic root of 1244689849 is about 1075.6897967633.

The spelling of 1244689849 in words is "one billion, two hundred forty-four million, six hundred eighty-nine thousand, eight hundred forty-nine".