1381506306 has 8 divisors (see below), whose sum is σ = 2763012624. Its totient is φ = 460502100.

The previous prime is 1381506277. The next prime is 1381506311. The reversal of 1381506306 is 6036051831.

It is a sphenic number, since it is the product of 3 distinct primes.

1381506306 is an admirable number.

It is an unprimeable number.

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, 115125520 + ... + 115125531.

It is an arithmetic number, because the mean of its divisors is an integer number (345376578).

Almost surely, 2^1381506306 is an apocalyptic number.

1381506306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1381506306 is a wasteful number, since it uses less digits than its factorization.

1381506306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230251056.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1381506306 is about 37168.6199098110. The cubic root of 1381506306 is about 1113.7412127573.

The spelling of 1381506306 in words is "one billion, three hundred eighty-one million, five hundred six thousand, three hundred six".