1381218604 has 24 divisors (see below), whose sum is σ = 2575016640. Its totient is φ = 646375824.

The previous prime is 1381218577. The next prime is 1381218611. The reversal of 1381218604 is 4068121831.

It is a self number, because there is not a number n which added to its sum of digits gives 1381218604.

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, 103174 + ... + 115789.

It is an arithmetic number, because the mean of its divisors is an integer number (107292360).

Almost surely, 2^1381218604 is an apocalyptic number.

It is an amenable number.

1381218604 is a deficient number, since it is larger than the sum of its proper divisors (1193798036).

1381218604 is a wasteful number, since it uses less digits than its factorization.

1381218604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219069 (or 219067 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 1381218604 is about 37164.7494811952. The cubic root of 1381218604 is about 1113.6638942973.

The spelling of 1381218604 in words is "one billion, three hundred eighty-one million, two hundred eighteen thousand, six hundred four".