1381840038 has 24 divisors (see below), whose sum is σ = 3001323000. Its totient is φ = 459484704.

The previous prime is 1381840013. The next prime is 1381840039. The reversal of 1381840038 is 8300481831.

It is a junction number, because it is equal to n+sod(n) for n = 1381839984 and 1381840011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381840039) 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, 86488 + ... + 101211.

It is an arithmetic number, because the mean of its divisors is an integer number (125055125).

Almost surely, 2^1381840038 is an apocalyptic number.

1381840038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1381840038 is an abundant number, since it is smaller than the sum of its proper divisors (1619482962).

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

1381840038 is a wasteful number, since it uses less digits than its factorization.

1381840038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188116 (or 188113 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1381840038 is about 37173.1090709400. The cubic root of 1381840038 is about 1113.8308881005.

The spelling of 1381840038 in words is "one billion, three hundred eighty-one million, eight hundred forty thousand, thirty-eight".