1397984926 has 32 divisors (see below), whose sum is σ = 2380119840. Its totient is φ = 610498944.

The previous prime is 1397984909. The next prime is 1397984941. The reversal of 1397984926 is 6294897931.

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 15 ways as a sum of consecutive naturals, for example, 598056 + ... + 600388.

It is an arithmetic number, because the mean of its divisors is an integer number (74378745).

Almost surely, 2^1397984926 is an apocalyptic number.

1397984926 is a deficient number, since it is larger than the sum of its proper divisors (982134914).

1397984926 is a wasteful number, since it uses less digits than its factorization.

1397984926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580.

The product of its digits is 5878656, while the sum is 58.

The square root of 1397984926 is about 37389.6366123021. The cubic root of 1397984926 is about 1118.1519603182.

The spelling of 1397984926 in words is "one billion, three hundred ninety-seven million, nine hundred eighty-four thousand, nine hundred twenty-six".