1381440812 has 24 divisors (see below), whose sum is σ = 2524284000. Its totient is φ = 660256256.

The previous prime is 1381440803. The next prime is 1381440829. The reversal of 1381440812 is 2180441831.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169814 + ... + 177762.

It is an arithmetic number, because the mean of its divisors is an integer number (105178500).

Almost surely, 2^1381440812 is an apocalyptic number.

It is an amenable number.

1381440812 is a deficient number, since it is larger than the sum of its proper divisors (1142843188).

1381440812 is a wasteful number, since it uses less digits than its factorization.

1381440812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9865 (or 9863 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1381440812 is about 37167.7388604688. The cubic root of 1381440812 is about 1113.7236125192.

The spelling of 1381440812 in words is "one billion, three hundred eighty-one million, four hundred forty thousand, eight hundred twelve".