1390806 has 12 divisors (see below), whose sum is σ = 3013452. Its totient is φ = 463596.

The previous prime is 1390801. The next prime is 1390813. The reversal of 1390806 is 6080931.

It is a self number, because there is not a number n which added to its sum of digits gives 1390806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390801) 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 5 ways as a sum of consecutive naturals, for example, 38616 + ... + 38651.

It is an arithmetic number, because the mean of its divisors is an integer number (251121).

2^1390806 is an apocalyptic number.

1390806 is an abundant number, since it is smaller than the sum of its proper divisors (1622646).

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

1390806 is a wasteful number, since it uses less digits than its factorization.

1390806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77275 (or 77272 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1390806 is about 1179.3243828566. The cubic root of 1390806 is about 111.6234698394.

The spelling of 1390806 in words is "one million, three hundred ninety thousand, eight hundred six".