1244943264 has 96 divisors (see below), whose sum is σ = 3419224704. Its totient is φ = 395873280.

The previous prime is 1244943257. The next prime is 1244943283. The reversal of 1244943264 is 4623494421.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1459062 + ... + 1459914.

It is an arithmetic number, because the mean of its divisors is an integer number (35616924).

Almost surely, 2^1244943264 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 1244943264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709612352).

1244943264 is an abundant number, since it is smaller than the sum of its proper divisors (2174281440).

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

1244943264 is a wasteful number, since it uses less digits than its factorization.

1244943264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 1542 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 1244943264 is about 35283.7535418215. The cubic root of 1244943264 is about 1075.7627941803.

The spelling of 1244943264 in words is "one billion, two hundred forty-four million, nine hundred forty-three thousand, two hundred sixty-four".