1396645816 has 8 divisors (see below), whose sum is σ = 2618710920. Its totient is φ = 698322904.

The previous prime is 1396645793. The next prime is 1396645837. The reversal of 1396645816 is 6185466931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1396645816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87290356 + ... + 87290371.

It is an arithmetic number, because the mean of its divisors is an integer number (327338865).

Almost surely, 2^1396645816 is an apocalyptic number.

It is an amenable number.

1396645816 is a deficient number, since it is larger than the sum of its proper divisors (1222065104).

1396645816 is a wasteful number, since it uses less digits than its factorization.

1396645816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174580733 (or 174580729 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 1396645816 is about 37371.7248197083. The cubic root of 1396645816 is about 1117.7948256099.

The spelling of 1396645816 in words is "one billion, three hundred ninety-six million, six hundred forty-five thousand, eight hundred sixteen".