397855801 has 8 divisors (see below), whose sum is σ = 478623680. Its totient is φ = 323070768.

The previous prime is 397855793. The next prime is 397855807. The reversal of 397855801 is 108558793.

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

It is a cyclic number.

It is not a de Polignac number, because 397855801 - 2³ = 397855793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397855807) 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 in 7 ways as a sum of consecutive naturals, for example, 1495566 + ... + 1495831.

It is an arithmetic number, because the mean of its divisors is an integer number (59827960).

Almost surely, 2^397855801 is an apocalyptic number.

It is an amenable number.

397855801 is a deficient number, since it is larger than the sum of its proper divisors (80767879).

397855801 is a wasteful number, since it uses less digits than its factorization.

397855801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991423.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 397855801 is about 19946.3229944770. The cubic root of 397855801 is about 735.4873908013.

The spelling of 397855801 in words is "three hundred ninety-seven million, eight hundred fifty-five thousand, eight hundred one".