1396688018 has 24 divisors (see below), whose sum is σ = 2389198896. Its totient is φ = 607250600.

The previous prime is 1396688009. The next prime is 1396688077. The reversal of 1396688018 is 8108866931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48368 + ... + 71643.

It is an arithmetic number, because the mean of its divisors is an integer number (99549954).

Almost surely, 2^1396688018 is an apocalyptic number.

1396688018 is a deficient number, since it is larger than the sum of its proper divisors (992510878).

1396688018 is a wasteful number, since it uses less digits than its factorization.

1396688018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120070 (or 120047 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 1396688018 is about 37372.2894401721. The cubic root of 1396688018 is about 1117.8060841794.

The spelling of 1396688018 in words is "one billion, three hundred ninety-six million, six hundred eighty-eight thousand, eighteen".