1244289438 has 120 divisors (see below), whose sum is σ = 3259908432. Its totient is φ = 354733344.

The previous prime is 1244289373. The next prime is 1244289467. The reversal of 1244289438 is 8349824421.

It is a super-3 number, since 3×1244289438³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1244289393 and 1244289402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2722506 + ... + 2722962.

Almost surely, 2^1244289438 is an apocalyptic number.

1244289438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244289438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1629954216).

1244289438 is an abundant number, since it is smaller than the sum of its proper divisors (2015618994).

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

1244289438 is an frugal number, since it uses more digits than its factorization.

1244289438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 469 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 1244289438 is about 35274.4870692686. The cubic root of 1244289438 is about 1075.5744362386.

The spelling of 1244289438 in words is "one billion, two hundred forty-four million, two hundred eighty-nine thousand, four hundred thirty-eight".