1385786918 has 4 divisors (see below), whose sum is σ = 2078680380. Its totient is φ = 692893458.

The previous prime is 1385786891. The next prime is 1385786933. The reversal of 1385786918 is 8196875831.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346446728 + ... + 346446731.

It is an arithmetic number, because the mean of its divisors is an integer number (519670095).

Almost surely, 2^1385786918 is an apocalyptic number.

1385786918 is a deficient number, since it is larger than the sum of its proper divisors (692893462).

1385786918 is an equidigital number, since it uses as much as digits as its factorization.

1385786918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692893461.

The product of its digits is 2903040, while the sum is 56.

The square root of 1385786918 is about 37226.1590551590. The cubic root of 1385786918 is about 1114.8903397150.

The spelling of 1385786918 in words is "one billion, three hundred eighty-five million, seven hundred eighty-six thousand, nine hundred eighteen".