6981138 has 24 divisors (see below), whose sum is σ = 15614976. Its totient is φ = 2251800.

The previous prime is 6981133. The next prime is 6981157. The reversal of 6981138 is 8311896.

It is not an unprimeable number, because it can be changed into a prime (6981133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5698 + ... + 6813.

It is an arithmetic number, because the mean of its divisors is an integer number (650624).

Almost surely, 2^6981138 is an apocalyptic number.

6981138 is an abundant number, since it is smaller than the sum of its proper divisors (8633838).

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

6981138 is a wasteful number, since it uses less digits than its factorization.

6981138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12550 (or 12547 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 6981138 is about 2642.1843236232. The cubic root of 6981138 is about 191.1211460638.

The spelling of 6981138 in words is "six million, nine hundred eighty-one thousand, one hundred thirty-eight".