397531846 has 4 divisors (see below), whose sum is σ = 596297772. Its totient is φ = 198765922.

The previous prime is 397531819. The next prime is 397531847. The reversal of 397531846 is 648135793.

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

It is a junction number, because it is equal to n+sod(n) for n = 397531796 and 397531805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397531847) 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 as a sum of consecutive naturals, namely, 99382960 + ... + 99382963.

It is an arithmetic number, because the mean of its divisors is an integer number (149074443).

Almost surely, 2^397531846 is an apocalyptic number.

397531846 is a deficient number, since it is larger than the sum of its proper divisors (198765926).

397531846 is a wasteful number, since it uses less digits than its factorization.

397531846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198765925.

The product of its digits is 544320, while the sum is 46.

The square root of 397531846 is about 19938.2006710736. The cubic root of 397531846 is about 735.2877124961.

The spelling of 397531846 in words is "three hundred ninety-seven million, five hundred thirty-one thousand, eight hundred forty-six".