1381333812 has 12 divisors (see below), whose sum is σ = 3223112256. Its totient is φ = 460444600.

The previous prime is 1381333799. The next prime is 1381333843. The reversal of 1381333812 is 2183331831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57555564 + ... + 57555587.

It is an arithmetic number, because the mean of its divisors is an integer number (268592688).

Almost surely, 2^1381333812 is an apocalyptic number.

1381333812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381333812 is an abundant number, since it is smaller than the sum of its proper divisors (1841778444).

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

1381333812 is a wasteful number, since it uses less digits than its factorization.

1381333812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115111158 (or 115111156 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 1381333812 is about 37166.2994122363. The cubic root of 1381333812 is about 1113.6948571544.

The spelling of 1381333812 in words is "one billion, three hundred eighty-one million, three hundred thirty-three thousand, eight hundred twelve".