1264440344 has 16 divisors (see below), whose sum is σ = 2371965120. Its totient is φ = 631916320.

The previous prime is 1264440337. The next prime is 1264440377. The reversal of 1264440344 is 4430444621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1264440344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19784 + ... + 54039.

It is an arithmetic number, because the mean of its divisors is an integer number (148247820).

Almost surely, 2^1264440344 is an apocalyptic number.

It is an amenable number.

1264440344 is a deficient number, since it is larger than the sum of its proper divisors (1107524776).

1264440344 is a wasteful number, since it uses less digits than its factorization.

1264440344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75970 (or 75966 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 1264440344 is about 35558.9699513358. The cubic root of 1264440344 is about 1081.3495771435.

Adding to 1264440344 its reverse (4430444621), we get a palindrome (5694884965).

The spelling of 1264440344 in words is "one billion, two hundred sixty-four million, four hundred forty thousand, three hundred forty-four".