1244386728 has 96 divisors (see below), whose sum is σ = 3663059400. Its totient is φ = 379344384.

The previous prime is 1244386691. The next prime is 1244386729. The reversal of 1244386728 is 8276834421.

It is a happy number.

1244386728 is a `hidden beast` number, since 1 + 244 + 386 + 7 + 28 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1074397284 + 169989444 = 32778^2 + 13038^2 .

It is not an unprimeable number, because it can be changed into a prime (1244386729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95926 + ... + 108122.

Almost surely, 2^1244386728 is an apocalyptic number.

1244386728 is a gapful number since it is divisible by the number (18) 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 1244386728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1831529700).

1244386728 is an abundant number, since it is smaller than the sum of its proper divisors (2418672672).

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

1244386728 is a wasteful number, since it uses less digits than its factorization.

1244386728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12331 (or 12324 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 1244386728 is about 35275.8660843359. The cubic root of 1244386728 is about 1075.6024682775.

The spelling of 1244386728 in words is "one billion, two hundred forty-four million, three hundred eighty-six thousand, seven hundred twenty-eight".