1244540460 has 48 divisors (see below), whose sum is σ = 3504211200. Its totient is φ = 330020544.

The previous prime is 1244540389. The next prime is 1244540467. The reversal of 1244540460 is 640454421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1244540467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47200 + ... + 68679.

It is an arithmetic number, because the mean of its divisors is an integer number (73004400).

Almost surely, 2^1244540460 is an apocalyptic number.

1244540460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244540460 is an abundant number, since it is smaller than the sum of its proper divisors (2259670740).

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

1244540460 is a wasteful number, since it uses less digits than its factorization.

1244540460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116070 (or 116068 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 1244540460 is about 35278.0450138610. The cubic root of 1244540460 is about 1075.6467598968.

Adding to 1244540460 its reverse (640454421), we get a palindrome (1884994881).

The spelling of 1244540460 in words is "one billion, two hundred forty-four million, five hundred forty thousand, four hundred sixty".