1397988795 has 64 divisors (see below), whose sum is σ = 2722277376. Its totient is φ = 598026240.

The previous prime is 1397988743. The next prime is 1397988811. The reversal of 1397988795 is 5978897931.

It is not a de Polignac number, because 1397988795 - 2⁹ = 1397988283 is a prime.

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 in 63 ways as a sum of consecutive naturals, for example, 320922 + ... + 325248.

It is an arithmetic number, because the mean of its divisors is an integer number (42535584).

Almost surely, 2^1397988795 is an apocalyptic number.

1397988795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1397988795 is a deficient number, since it is larger than the sum of its proper divisors (1324288581).

1397988795 is a wasteful number, since it uses less digits than its factorization.

1397988795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540.

The product of its digits is 34292160, while the sum is 66.

The square root of 1397988795 is about 37389.6883512019. The cubic root of 1397988795 is about 1118.1529918328.

The spelling of 1397988795 in words is "one billion, three hundred ninety-seven million, nine hundred eighty-eight thousand, seven hundred ninety-five".