1338781900 has 36 divisors (see below), whose sum is σ = 2908485720. Its totient is φ = 534899200.

The previous prime is 1338781891. The next prime is 1338781901. The reversal of 1338781900 is 91878331.

It is a super-2 number, since 2×1338781900² = 3584673951535220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1338781901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85695 + ... + 100105.

It is an arithmetic number, because the mean of its divisors is an integer number (80791270).

Almost surely, 2^1338781900 is an apocalyptic number.

1338781900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1338781900 is an abundant number, since it is smaller than the sum of its proper divisors (1569703820).

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

1338781900 is a wasteful number, since it uses less digits than its factorization.

1338781900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15354 (or 15347 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1338781900 is about 36589.3686745207. The cubic root of 1338781900 is about 1102.1396096523.

The spelling of 1338781900 in words is "one billion, three hundred thirty-eight million, seven hundred eighty-one thousand, nine hundred".