1397382885 has 24 divisors (see below), whose sum is σ = 2487596280. Its totient is φ = 725127552.

The previous prime is 1397382853. The next prime is 1397382901. The reversal of 1397382885 is 5882837931.

It can be written as a sum of positive squares in 4 ways, for example, as 476199684 + 921183201 = 21822^2 + 30351^2 .

It is not a de Polignac number, because 1397382885 - 2⁵ = 1397382853 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 417970 + ... + 421299.

It is an arithmetic number, because the mean of its divisors is an integer number (103649845).

Almost surely, 2^1397382885 is an apocalyptic number.

1397382885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1397382885 is a deficient number, since it is larger than the sum of its proper divisors (1090213395).

1397382885 is a wasteful number, since it uses less digits than its factorization.

1397382885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839317 (or 839314 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 1397382885 is about 37381.5848379921. The cubic root of 1397382885 is about 1117.9914268797.

The spelling of 1397382885 in words is "one billion, three hundred ninety-seven million, three hundred eighty-two thousand, eight hundred eighty-five".