397748155 has 8 divisors (see below), whose sum is σ = 545483232. Its totient is φ = 272741568.

The previous prime is 397748129. The next prime is 397748161. The reversal of 397748155 is 551847793.

It is a happy number.

397748155 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 397748155 - 2⁷ = 397748027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397748099 and 397748108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5682082 + ... + 5682151.

It is an arithmetic number, because the mean of its divisors is an integer number (68185404).

Almost surely, 2^397748155 is an apocalyptic number.

397748155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

397748155 is a deficient number, since it is larger than the sum of its proper divisors (147735077).

397748155 is a wasteful number, since it uses less digits than its factorization.

397748155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11364245.

The product of its digits is 1058400, while the sum is 49.

The square root of 397748155 is about 19943.6244198491. The cubic root of 397748155 is about 735.4210523466.

The spelling of 397748155 in words is "three hundred ninety-seven million, seven hundred forty-eight thousand, one hundred fifty-five".