1378609838 has 16 divisors (see below), whose sum is σ = 2080615680. Its totient is φ = 685083000.

The previous prime is 1378609823. The next prime is 1378609853. The reversal of 1378609838 is 8389068731.

It is an interprime number because it is at equal distance from previous prime (1378609823) and next prime (1378609853).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1378609838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270413 + ... + 275463.

It is an arithmetic number, because the mean of its divisors is an integer number (130038480).

Almost surely, 2^1378609838 is an apocalyptic number.

1378609838 is a deficient number, since it is larger than the sum of its proper divisors (702005842).

1378609838 is a wasteful number, since it uses less digits than its factorization.

1378609838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5863.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 1378609838 is about 37129.6355759116. The cubic root of 1378609838 is about 1112.9623110408.

The spelling of 1378609838 in words is "one billion, three hundred seventy-eight million, six hundred nine thousand, eight hundred thirty-eight".