397882812 has 12 divisors (see below), whose sum is σ = 928393256. Its totient is φ = 132627600.

The previous prime is 397882801. The next prime is 397882829. The reversal of 397882812 is 218288793.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 16578439 + ... + 16578462.

Almost surely, 2^397882812 is an apocalyptic number.

It is an amenable number.

397882812 is an abundant number, since it is smaller than the sum of its proper divisors (530510444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397882812 is a wasteful number, since it uses less digits than its factorization.

397882812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33156908 (or 33156906 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 397882812 is about 19947.0000751993. Note that the first 4 decimals coincide. The cubic root of 397882812 is about 735.5040348554.

The spelling of 397882812 in words is "three hundred ninety-seven million, eight hundred eighty-two thousand, eight hundred twelve".