1366487838 has 12 divisors (see below), whose sum is σ = 2960723688. Its totient is φ = 455495940.

The previous prime is 1366487831. The next prime is 1366487839. The reversal of 1366487838 is 8387846631.

It is a super-2 number, since 2×1366487838² = 3734578022803828488, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366487831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37957978 + ... + 37958013.

It is an arithmetic number, because the mean of its divisors is an integer number (246726974).

Almost surely, 2^1366487838 is an apocalyptic number.

1366487838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1366487838 is an abundant number, since it is smaller than the sum of its proper divisors (1594235850).

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

1366487838 is a wasteful number, since it uses less digits than its factorization.

1366487838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75915999 (or 75915996 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 1366487838 is about 36966.0362765607. The cubic root of 1366487838 is about 1109.6906418149.

The spelling of 1366487838 in words is "one billion, three hundred sixty-six million, four hundred eighty-seven thousand, eight hundred thirty-eight".