1244541040 has 160 divisors (see below), whose sum is σ = 3219793920. Its totient is φ = 445243392.

The previous prime is 1244541031. The next prime is 1244541043. The reversal of 1244541040 is 401454421.

It is a junction number, because it is equal to n+sod(n) for n = 1244540996 and 1244541014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244541043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3390937 + ... + 3391303.

It is an arithmetic number, because the mean of its divisors is an integer number (20123712).

Almost surely, 2^1244541040 is an apocalyptic number.

1244541040 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 1244541040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1609896960).

1244541040 is an abundant number, since it is smaller than the sum of its proper divisors (1975252880).

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

1244541040 is a wasteful number, since it uses less digits than its factorization.

1244541040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1244541040 is about 35278.0532342702. The cubic root of 1244541040 is about 1075.6469269933.

Adding to 1244541040 its reverse (401454421), we get a palindrome (1645995461).

The spelling of 1244541040 in words is "one billion, two hundred forty-four million, five hundred forty-one thousand, forty".