1381009312 has 24 divisors (see below), whose sum is σ = 2792347236. Its totient is φ = 671841792.

The previous prime is 1381009291. The next prime is 1381009313. The reversal of 1381009312 is 2139001831.

It can be written as a sum of positive squares in 2 ways, for example, as 1318851856 + 62157456 = 36316^2 + 7884^2 .

It is not an unprimeable number, because it can be changed into a prime (1381009313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582013 + ... + 584380.

Almost surely, 2^1381009312 is an apocalyptic number.

It is an amenable number.

1381009312 is an abundant number, since it is smaller than the sum of its proper divisors (1411337924).

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

1381009312 is a wasteful number, since it uses less digits than its factorization.

1381009312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166440 (or 1166432 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1381009312 is about 37161.9336418330. The cubic root of 1381009312 is about 1113.6076413825.

The spelling of 1381009312 in words is "one billion, three hundred eighty-one million, nine thousand, three hundred twelve".