397231382 has 4 divisors (see below), whose sum is σ = 595847076. Its totient is φ = 198615690.

The previous prime is 397231381. The next prime is 397231397. The reversal of 397231382 is 283132793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397231381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99307844 + ... + 99307847.

It is an arithmetic number, because the mean of its divisors is an integer number (148961769).

Almost surely, 2^397231382 is an apocalyptic number.

397231382 is a deficient number, since it is larger than the sum of its proper divisors (198615694).

397231382 is a wasteful number, since it uses less digits than its factorization.

397231382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198615693.

The product of its digits is 54432, while the sum is 38.

The square root of 397231382 is about 19930.6643642403. The cubic root of 397231382 is about 735.1024165057.

The spelling of 397231382 in words is "three hundred ninety-seven million, two hundred thirty-one thousand, three hundred eighty-two".