1396666384 has 15 divisors (see below), whose sum is σ = 2706330783. Its totient is φ = 698258448.

The previous prime is 1396666373. The next prime is 1396666387. The reversal of 1396666384 is 4836666931.

The square root of 1396666384 is 37372.

It is a perfect power (a square), and thus also a powerful number.

It is a super-3 number, since 3×1396666384³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396666387) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 144817 + ... + 154159.

Almost surely, 2^1396666384 is an apocalyptic number.

1396666384 is the 37372-nd square number.

It is an amenable number.

1396666384 is a deficient number, since it is larger than the sum of its proper divisors (1309664399).

1396666384 is an frugal number, since it uses more digits than its factorization.

1396666384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18694 (or 9345 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 52.

The cubic root of 1396666384 is about 1117.8003127303.

The spelling of 1396666384 in words is "one billion, three hundred ninety-six million, six hundred sixty-six thousand, three hundred eighty-four".