6861390 has 16 divisors (see below), whose sum is σ = 16467408. Its totient is φ = 1829696.

The previous prime is 6861377. The next prime is 6861397. The reversal of 6861390 is 931686.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6861397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114327 + ... + 114386.

It is an arithmetic number, because the mean of its divisors is an integer number (1029213).

Almost surely, 2^6861390 is an apocalyptic number.

6861390 is an abundant number, since it is smaller than the sum of its proper divisors (9606018).

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

6861390 is a wasteful number, since it uses less digits than its factorization.

6861390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228723.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 6861390 is about 2619.4255095345. The cubic root of 6861390 is about 190.0220657660.

The spelling of 6861390 in words is "six million, eight hundred sixty-one thousand, three hundred ninety".