1240540144 has 80 divisors (see below), whose sum is σ = 2659829760. Its totient is φ = 558455040.

The previous prime is 1240540127. The next prime is 1240540151. The reversal of 1240540144 is 4410450421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420627 + ... + 423565.

It is an arithmetic number, because the mean of its divisors is an integer number (33247872).

Almost surely, 2^1240540144 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 1240540144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1329914880).

1240540144 is an abundant number, since it is smaller than the sum of its proper divisors (1419289616).

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

1240540144 is a wasteful number, since it uses less digits than its factorization.

1240540144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038 (or 3032 counting only the distinct ones).

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

The square root of 1240540144 is about 35221.3024177131. The cubic root of 1240540144 is about 1074.4930420869.

Adding to 1240540144 its reverse (4410450421), we get a palindrome (5650990565).

The spelling of 1240540144 in words is "one billion, two hundred forty million, five hundred forty thousand, one hundred forty-four".