397799982 has 12 divisors (see below), whose sum is σ = 861900000. Its totient is φ = 132599988.

The previous prime is 397799959. The next prime is 397800037. The reversal of 397799982 is 289997793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11049982 + ... + 11050017.

It is an arithmetic number, because the mean of its divisors is an integer number (71825000).

Almost surely, 2^397799982 is an apocalyptic number.

397799982 is an abundant number, since it is smaller than the sum of its proper divisors (464100018).

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

397799982 is a wasteful number, since it uses less digits than its factorization.

397799982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100007 (or 22100004 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 63.

The square root of 397799982 is about 19944.9237150710. The cubic root of 397799982 is about 735.4529930030.

The spelling of 397799982 in words is "three hundred ninety-seven million, seven hundred ninety-nine thousand, nine hundred eighty-two".