1378310685 has 32 divisors (see below), whose sum is σ = 2279129088. Its totient is φ = 710544960.

The previous prime is 1378310641. The next prime is 1378310701. The reversal of 1378310685 is 5860138731.

It is not a de Polignac number, because 1378310685 - 2⁶ = 1378310621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 660654 + ... + 662736.

It is an arithmetic number, because the mean of its divisors is an integer number (71222784).

Almost surely, 2^1378310685 is an apocalyptic number.

1378310685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378310685 is a deficient number, since it is larger than the sum of its proper divisors (900818403).

1378310685 is a wasteful number, since it uses less digits than its factorization.

1378310685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1378310685 is about 37125.6068637268. The cubic root of 1378310685 is about 1112.8818023790.

The spelling of 1378310685 in words is "one billion, three hundred seventy-eight million, three hundred ten thousand, six hundred eighty-five".