1393816 has 16 divisors (see below), whose sum is σ = 2658600. Its totient is φ = 684864.

The previous prime is 1393807. The next prime is 1393817. The reversal of 1393816 is 6183931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005 + ... + 1948.

2^1393816 is an apocalyptic number.

It is an amenable number.

1393816 is a deficient number, since it is larger than the sum of its proper divisors (1264784).

1393816 is a wasteful number, since it uses less digits than its factorization.

1393816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018 (or 3014 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 1393816 is about 1180.5998475351. The cubic root of 1393816 is about 111.7039374610.

It can be divided in two parts, 1393 and 816, that added together give a square (2209 = 47²).

The spelling of 1393816 in words is "one million, three hundred ninety-three thousand, eight hundred sixteen".