1244251340 has 48 divisors (see below), whose sum is σ = 2729825280. Its totient is φ = 475823040.

The previous prime is 1244251339. The next prime is 1244251367. The reversal of 1244251340 is 431524421.

It is a super-2 number, since 2×1244251340² = 3096322794183591200, which contains 22 as substring.

It is an unprimeable number.

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, 39371 + ... + 63549.

It is an arithmetic number, because the mean of its divisors is an integer number (56871360).

Almost surely, 2^1244251340 is an apocalyptic number.

1244251340 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 1244251340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364912640).

1244251340 is an abundant number, since it is smaller than the sum of its proper divisors (1485573940).

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

1244251340 is a wasteful number, since it uses less digits than its factorization.

1244251340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24302 (or 24300 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1244251340 is about 35273.9470431082. The cubic root of 1244251340 is about 1075.5634587142.

Adding to 1244251340 its reverse (431524421), we get a palindrome (1675775761).

The spelling of 1244251340 in words is "one billion, two hundred forty-four million, two hundred fifty-one thousand, three hundred forty".