6140406440 has 64 divisors (see below), whose sum is σ = 15929429760. Its totient is φ = 2086640640.

The previous prime is 6140406421. The next prime is 6140406449. The reversal of 6140406440 is 446040416.

It is not an unprimeable number, because it can be changed into a prime (6140406449) 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, 65396 + ... + 128675.

It is an arithmetic number, because the mean of its divisors is an integer number (248897340).

Almost surely, 2^6140406440 is an apocalyptic number.

It is an amenable number.

6140406440 is an abundant number, since it is smaller than the sum of its proper divisors (9789023320).

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

6140406440 is a wasteful number, since it uses less digits than its factorization.

6140406440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194202 (or 194198 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 6140406440 is about 78360.7455298889. The cubic root of 6140406440 is about 1831.1856351709.

Adding to 6140406440 its reverse (446040416), we get a palindrome (6586446856).

The spelling of 6140406440 in words is "six billion, one hundred forty million, four hundred six thousand, four hundred forty".