1366813938 has 24 divisors (see below), whose sum is σ = 3179935152. Its totient is φ = 390518184.

The previous prime is 1366813913. The next prime is 1366813949. The reversal of 1366813938 is 8393186631.

It is a happy number.

It is a super-2 number, since 2×1366813938² = 3736360682222135688, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2324220 + ... + 2324807.

It is an arithmetic number, because the mean of its divisors is an integer number (132497298).

Almost surely, 2^1366813938 is an apocalyptic number.

1366813938 is an abundant number, since it is smaller than the sum of its proper divisors (1813121214).

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

1366813938 is a wasteful number, since it uses less digits than its factorization.

1366813938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649046 (or 4649039 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 1366813938 is about 36970.4468190472. The cubic root of 1366813938 is about 1109.7789073489.

The spelling of 1366813938 in words is "one billion, three hundred sixty-six million, eight hundred thirteen thousand, nine hundred thirty-eight".