1366409944 has 32 divisors (see below), whose sum is σ = 2730309120. Its totient is φ = 639592096.

The previous prime is 1366409903. The next prime is 1366409953. The reversal of 1366409944 is 4499046631.

It is a super-2 number, since 2×1366409944² = 3734152270124166272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 1366409894 and 1366409903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70354 + ... + 87649.

It is an arithmetic number, because the mean of its divisors is an integer number (85322160).

Almost surely, 2^1366409944 is an apocalyptic number.

It is an amenable number.

1366409944 is a deficient number, since it is larger than the sum of its proper divisors (1363899176).

1366409944 is a wasteful number, since it uses less digits than its factorization.

1366409944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158079 (or 158075 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 1366409944 is about 36964.9826727945. The cubic root of 1366409944 is about 1109.6695561570.

The spelling of 1366409944 in words is "one billion, three hundred sixty-six million, four hundred nine thousand, nine hundred forty-four".