1381520336 has 20 divisors (see below), whose sum is σ = 3059080992. Its totient is φ = 592080096.

The previous prime is 1381520311. The next prime is 1381520377. The reversal of 1381520336 is 6330251831.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6167390 + ... + 6167613.

Almost surely, 2^1381520336 is an apocalyptic number.

1381520336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1381520336 is an abundant number, since it is smaller than the sum of its proper divisors (1677560656).

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

1381520336 is a wasteful number, since it uses less digits than its factorization.

1381520336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12335018 (or 12335012 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1381520336 is about 37168.8086438078. The cubic root of 1381520336 is about 1113.7449829744.

The spelling of 1381520336 in words is "one billion, three hundred eighty-one million, five hundred twenty thousand, three hundred thirty-six".