1366189444 has 9 divisors (see below), whose sum is σ = 2390960901. Its totient is φ = 683057760.

The previous prime is 1366189393. The next prime is 1366189457. The reversal of 1366189444 is 4449816631.

The square root of 1366189444 is 36962.

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

It can be written as a sum of positive squares in only one way, i.e., 1291539844 + 74649600 = 35938^2 + 8640^2 .

It is a super-4 number, since 4×1366189444⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1366189394 and 1366189403.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 64684 + ... + 83164.

Almost surely, 2^1366189444 is an apocalyptic number.

1366189444 is the 36962-nd square number.

It is an amenable number.

1366189444 is a deficient number, since it is larger than the sum of its proper divisors (1024771457).

1366189444 is an frugal number, since it uses more digits than its factorization.

1366189444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36966 (or 18483 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The cubic root of 1366189444 is about 1109.6098631634.

The spelling of 1366189444 in words is "one billion, three hundred sixty-six million, one hundred eighty-nine thousand, four hundred forty-four".