397286620 has 12 divisors (see below), whose sum is σ = 834301944. Its totient is φ = 158914640.

The previous prime is 397286609. The next prime is 397286627. The reversal of 397286620 is 26682793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397286627) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9932146 + ... + 9932185.

It is an arithmetic number, because the mean of its divisors is an integer number (69525162).

Almost surely, 2^397286620 is an apocalyptic number.

It is an amenable number.

397286620 is an abundant number, since it is smaller than the sum of its proper divisors (437015324).

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

397286620 is a wasteful number, since it uses less digits than its factorization.

397286620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19864340 (or 19864338 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 397286620 is about 19932.0500701759. The cubic root of 397286620 is about 735.1364887594.

The spelling of 397286620 in words is "three hundred ninety-seven million, two hundred eighty-six thousand, six hundred twenty".