1381943020 has 12 divisors (see below), whose sum is σ = 2902080384. Its totient is φ = 552777200.

The previous prime is 1381943011. The next prime is 1381943027. The reversal of 1381943020 is 203491831.

It is not an unprimeable number, because it can be changed into a prime (1381943027) 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 3 ways as a sum of consecutive naturals, for example, 34548556 + ... + 34548595.

It is an arithmetic number, because the mean of its divisors is an integer number (241840032).

Almost surely, 2^1381943020 is an apocalyptic number.

1381943020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381943020 is an abundant number, since it is smaller than the sum of its proper divisors (1520137364).

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

1381943020 is a wasteful number, since it uses less digits than its factorization.

1381943020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69097160 (or 69097158 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1381943020 is about 37174.4942131026. The cubic root of 1381943020 is about 1113.8585569285.

The spelling of 1381943020 in words is "one billion, three hundred eighty-one million, nine hundred forty-three thousand, twenty".