1390804 has 24 divisors (see below), whose sum is σ = 2614248. Its totient is φ = 645120.

The previous prime is 1390801. The next prime is 1390813. The reversal of 1390804 is 4080931.

It can be written as a sum of positive squares in 4 ways, for example, as 21904 + 1368900 = 148^2 + 1170^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7594 + ... + 7774.

It is an arithmetic number, because the mean of its divisors is an integer number (108927).

2^1390804 is an apocalyptic number.

It is an amenable number.

1390804 is a deficient number, since it is larger than the sum of its proper divisors (1223444).

1390804 is a wasteful number, since it uses less digits than its factorization.

1390804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1390804 is about 1179.3235349131. The cubic root of 1390804 is about 111.6234163339.

The spelling of 1390804 in words is "one million, three hundred ninety thousand, eight hundred four".