2421340440 has 32 divisors (see below), whose sum is σ = 7264021680. Its totient is φ = 645690752.

The previous prime is 2421340393. The next prime is 2421340459. The reversal of 2421340440 is 440431242.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2421340440.

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, 10088799 + ... + 10089038.

Almost surely, 2^2421340440 is an apocalyptic number.

2421340440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2421340440 is an abundant number, since it is smaller than the sum of its proper divisors (4842681240).

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

2421340440 is a wasteful number, since it uses less digits than its factorization.

2421340440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20177851 (or 20177847 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 2421340440 is about 49207.1177778175. The cubic root of 2421340440 is about 1342.8225275735.

Adding to 2421340440 its reverse (440431242), we get a palindrome (2861771682).

The spelling of 2421340440 in words is "two billion, four hundred twenty-one million, three hundred forty thousand, four hundred forty".