1244327540 has 24 divisors (see below), whose sum is σ = 2649894912. Its totient is φ = 490720160.

The previous prime is 1244327527. The next prime is 1244327561. The reversal of 1244327540 is 457234421.

It is a junction number, because it is equal to n+sod(n) for n = 1244327497 and 1244327506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436724 + ... + 439563.

It is an arithmetic number, because the mean of its divisors is an integer number (110412288).

Almost surely, 2^1244327540 is an apocalyptic number.

1244327540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244327540 is an abundant number, since it is smaller than the sum of its proper divisors (1405567372).

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

1244327540 is a wasteful number, since it uses less digits than its factorization.

1244327540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876367 (or 876365 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 1244327540 is about 35275.0271438592. The cubic root of 1244327540 is about 1075.5854146915.

The spelling of 1244327540 in words is "one billion, two hundred forty-four million, three hundred twenty-seven thousand, five hundred forty".