6139940 has 24 divisors (see below), whose sum is σ = 12941880. Its totient is φ = 2446848.

The previous prime is 6139937. The next prime is 6139949. The reversal of 6139940 is 499316.

It can be written as a sum of positive squares in 4 ways, for example, as 68644 + 6071296 = 262^2 + 2464^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6139897 and 6139906.

It is not an unprimeable number, because it can be changed into a prime (6139949) 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, 8306 + ... + 9014.

It is an arithmetic number, because the mean of its divisors is an integer number (539245).

Almost surely, 2^6139940 is an apocalyptic number.

It is an amenable number.

6139940 is an abundant number, since it is smaller than the sum of its proper divisors (6801940).

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

6139940 is a wasteful number, since it uses less digits than its factorization.

6139940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 6139940 is about 2477.8902316285. The cubic root of 6139940 is about 183.1139266913.

The spelling of 6139940 in words is "six million, one hundred thirty-nine thousand, nine hundred forty".