397680658 has 8 divisors (see below), whose sum is σ = 603223740. Its totient is φ = 196606080.

The previous prime is 397680653. The next prime is 397680667. The reversal of 397680658 is 856086793.

It can be written as a sum of positive squares in 2 ways, for example, as 384042409 + 13638249 = 19597^2 + 3693^2 .

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

It is not an unprimeable number, because it can be changed into a prime (397680653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116903 + ... + 1117258.

Almost surely, 2^397680658 is an apocalyptic number.

397680658 is a deficient number, since it is larger than the sum of its proper divisors (205543082).

397680658 is a wasteful number, since it uses less digits than its factorization.

397680658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234252.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 397680658 is about 19941.9321531290. The cubic root of 397680658 is about 735.3794502069.

The spelling of 397680658 in words is "three hundred ninety-seven million, six hundred eighty thousand, six hundred fifty-eight".