1244553040 has 20 divisors (see below), whose sum is σ = 2893586004. Its totient is φ = 497821184.

The previous prime is 1244553031. The next prime is 1244553047. The reversal of 1244553040 is 403554421.

It can be written as a sum of positive squares in 2 ways, for example, as 406103104 + 838449936 = 20152^2 + 28956^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244553047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7778377 + ... + 7778536.

Almost surely, 2^1244553040 is an apocalyptic number.

1244553040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244553040 is an abundant number, since it is smaller than the sum of its proper divisors (1649032964).

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

1244553040 is a wasteful number, since it uses less digits than its factorization.

1244553040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15556926 (or 15556920 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1244553040 is about 35278.2233112724. The cubic root of 1244553040 is about 1075.6503841504.

The spelling of 1244553040 in words is "one billion, two hundred forty-four million, five hundred fifty-three thousand, forty".