1240320544 has 48 divisors (see below), whose sum is σ = 2608531128. Its totient is φ = 578486272.

The previous prime is 1240320467. The next prime is 1240320547. The reversal of 1240320544 is 4450230421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 984704400 + 255616144 = 31380^2 + 15988^2 .

It is not an unprimeable number, because it can be changed into a prime (1240320547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51384 + ... + 71560.

Almost surely, 2^1240320544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240320544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304265564).

1240320544 is an abundant number, since it is smaller than the sum of its proper divisors (1368210584).

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

1240320544 is a wasteful number, since it uses less digits than its factorization.

1240320544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20317 (or 20309 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1240320544 is about 35218.1848481718. The cubic root of 1240320544 is about 1074.4296362128.

Adding to 1240320544 its reverse (4450230421), we get a palindrome (5690550965).

The spelling of 1240320544 in words is "one billion, two hundred forty million, three hundred twenty thousand, five hundred forty-four".