1381040394 has 8 divisors (see below), whose sum is σ = 2762080800. Its totient is φ = 460346796.

The previous prime is 1381040393. The next prime is 1381040399. The reversal of 1381040394 is 4930401831.

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

1381040394 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1381040393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115086694 + ... + 115086705.

It is an arithmetic number, because the mean of its divisors is an integer number (345260100).

Almost surely, 2^1381040394 is an apocalyptic number.

1381040394 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.

1381040394 is a wasteful number, since it uses less digits than its factorization.

1381040394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230173404.

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

The square root of 1381040394 is about 37162.3518362334. The cubic root of 1381040394 is about 1113.6159958743.

The spelling of 1381040394 in words is "one billion, three hundred eighty-one million, forty thousand, three hundred ninety-four".