1244746720 has 96 divisors (see below), whose sum is σ = 3469326336. Its totient is φ = 412992000.

The previous prime is 1244746717. The next prime is 1244746721. The reversal of 1244746720 is 276474421.

It is a self number, because there is not a number n which added to its sum of digits gives 1244746720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244746721) 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 15 ways as a sum of consecutive naturals, for example, 16795 + ... + 52645.

It is an arithmetic number, because the mean of its divisors is an integer number (36138816).

Almost surely, 2^1244746720 is an apocalyptic number.

1244746720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244746720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734663168).

1244746720 is an abundant number, since it is smaller than the sum of its proper divisors (2224579616).

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

1244746720 is a wasteful number, since it uses less digits than its factorization.

1244746720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35904 (or 35896 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 1244746720 is about 35280.9682406818. The cubic root of 1244746720 is about 1075.7061795922.

The spelling of 1244746720 in words is "one billion, two hundred forty-four million, seven hundred forty-six thousand, seven hundred twenty".