1378726216 has 32 divisors (see below), whose sum is σ = 2963378880. Its totient is φ = 589089600.

The previous prime is 1378726189. The next prime is 1378726289. The reversal of 1378726216 is 6126278731.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18655 + ... + 55726.

It is an arithmetic number, because the mean of its divisors is an integer number (92605590).

Almost surely, 2^1378726216 is an apocalyptic number.

It is an amenable number.

1378726216 is an abundant number, since it is smaller than the sum of its proper divisors (1584652664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378726216 is a wasteful number, since it uses less digits than its factorization.

1378726216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74725 (or 74721 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 1378726216 is about 37131.2027276252. The cubic root of 1378726216 is about 1112.9936277774.

The spelling of 1378726216 in words is "one billion, three hundred seventy-eight million, seven hundred twenty-six thousand, two hundred sixteen".