1393881 has 16 divisors (see below), whose sum is σ = 1991808. Its totient is φ = 864000.

The previous prime is 1393871. The next prime is 1393883. The reversal of 1393881 is 1883931.

It is not a de Polignac number, because 1393881 - 2⁶ = 1393817 is a prime.

It is a super-2 number, since 2×1393881² = 3885808484322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7611 + ... + 7791.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2^1393881 is an apocalyptic number.

It is an amenable number.

1393881 is a deficient number, since it is larger than the sum of its proper divisors (597927).

1393881 is a wasteful number, since it uses less digits than its factorization.

1393881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its digits is 5184, while the sum is 33.

The square root of 1393881 is about 1180.6273755932. The cubic root of 1393881 is about 111.7056738555.

The spelling of 1393881 in words is "one million, three hundred ninety-three thousand, eight hundred eighty-one".