1366538944 has 56 divisors (see below), whose sum is σ = 2749344768. Its totient is φ = 673854720.

The previous prime is 1366538941. The next prime is 1366538963. The reversal of 1366538944 is 4498356631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1366538941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2951257 + ... + 2951719.

Almost surely, 2^1366538944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366538944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374672384).

1366538944 is an abundant number, since it is smaller than the sum of its proper divisors (1382805824).

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

1366538944 is a wasteful number, since it uses less digits than its factorization.

1366538944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1003 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The square root of 1366538944 is about 36966.7275262499. The cubic root of 1366538944 is about 1109.7044756111.

The spelling of 1366538944 in words is "one billion, three hundred sixty-six million, five hundred thirty-eight thousand, nine hundred forty-four".