7138686 has 16 divisors (see below), whose sum is σ = 14317200. Its totient is φ = 2372928.

The previous prime is 7138673. The next prime is 7138693. The reversal of 7138686 is 6868317.

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, 1000 + ... + 3908.

It is an arithmetic number, because the mean of its divisors is an integer number (894825).

Almost surely, 2^7138686 is an apocalyptic number.

7138686 is an abundant number, since it is smaller than the sum of its proper divisors (7178514).

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

7138686 is a wasteful number, since it uses less digits than its factorization.

7138686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323.

The product of its digits is 48384, while the sum is 39.

The square root of 7138686 is about 2671.8319557936. The cubic root of 7138686 is about 192.5481838117.

The spelling of 7138686 in words is "seven million, one hundred thirty-eight thousand, six hundred eighty-six".