1397942852 has 24 divisors (see below), whose sum is σ = 2557072896. Its totient is φ = 667453248.

The previous prime is 1397942849. The next prime is 1397942863. The reversal of 1397942852 is 2582497931.

It is a self number, because there is not a number n which added to its sum of digits gives 1397942852.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43328 + ... + 68360.

It is an arithmetic number, because the mean of its divisors is an integer number (106544704).

Almost surely, 2^1397942852 is an apocalyptic number.

It is an amenable number.

1397942852 is a deficient number, since it is larger than the sum of its proper divisors (1159130044).

1397942852 is a wasteful number, since it uses less digits than its factorization.

1397942852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25667 (or 25665 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 1397942852 is about 37389.0739655317. The cubic root of 1397942852 is about 1118.1407428397.

The spelling of 1397942852 in words is "one billion, three hundred ninety-seven million, nine hundred forty-two thousand, eight hundred fifty-two".