1366440228 has 18 divisors (see below), whose sum is σ = 3454057334. Its totient is φ = 455480064.

The previous prime is 1366440203. The next prime is 1366440239. The reversal of 1366440228 is 8220446631.

1366440228 is a `hidden beast` number, since 1 + 3 + 6 + 644 + 0 + 2 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 809857764 + 556582464 = 28458^2 + 23592^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 37956673 = 1366440228 / (1 + 3 + 6 + 6 + 4 + 4 + 0 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1366440192 and 1366440201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18978301 + ... + 18978372.

Almost surely, 2^1366440228 is an apocalyptic number.

1366440228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1366440228 is an abundant number, since it is smaller than the sum of its proper divisors (2087617106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1366440228 is a wasteful number, since it uses less digits than its factorization.

1366440228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37956683 (or 37956678 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 1366440228 is about 36965.3923014487. The cubic root of 1366440228 is about 1109.6777540346.

Adding to 1366440228 its reverse (8220446631), we get a palindrome (9586886859).

The spelling of 1366440228 in words is "one billion, three hundred sixty-six million, four hundred forty thousand, two hundred twenty-eight".