1396681646 has 8 divisors (see below), whose sum is σ = 2146120704. Its totient is φ = 681308080.

The previous prime is 1396681619. The next prime is 1396681679. The reversal of 1396681646 is 6461866931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1396681594 and 1396681603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8516270 + ... + 8516433.

It is an arithmetic number, because the mean of its divisors is an integer number (268265088).

Almost surely, 2^1396681646 is an apocalyptic number.

1396681646 is a deficient number, since it is larger than the sum of its proper divisors (749439058).

1396681646 is a wasteful number, since it uses less digits than its factorization.

1396681646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17032746.

The product of its digits is 1119744, while the sum is 50.

The square root of 1396681646 is about 37372.2041897451. The cubic root of 1396681646 is about 1117.8043842839.

The spelling of 1396681646 in words is "one billion, three hundred ninety-six million, six hundred eighty-one thousand, six hundred forty-six".