397682210 has 8 divisors (see below), whose sum is σ = 715827996. Its totient is φ = 159072880.

The previous prime is 397682183. The next prime is 397682221. The reversal of 397682210 is 12286793.

It can be written as a sum of positive squares in 2 ways, for example, as 365612641 + 32069569 = 19121^2 + 5663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×397682210² = 316302280300968200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19884101 + ... + 19884120.

Almost surely, 2^397682210 is an apocalyptic number.

397682210 is a deficient number, since it is larger than the sum of its proper divisors (318145786).

397682210 is a wasteful number, since it uses less digits than its factorization.

397682210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39768228.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 397682210 is about 19941.9710660707. The cubic root of 397682210 is about 735.3804068433.

The spelling of 397682210 in words is "three hundred ninety-seven million, six hundred eighty-two thousand, two hundred ten".