397729287235 has 32 divisors (see below), whose sum is σ = 550998640512. Its totient is φ = 269959372800.

The previous prime is 397729287223. The next prime is 397729287253. The reversal of 397729287235 is 532782927793.

It is not a de Polignac number, because 397729287235 - 2⁹ = 397729286723 is a prime.

It is a super-2 number, since 2×397729287235² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16507017 + ... + 16531093.

It is an arithmetic number, because the mean of its divisors is an integer number (17218707516).

Almost surely, 2^397729287235 is an apocalyptic number.

397729287235 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

397729287235 is a deficient number, since it is larger than the sum of its proper divisors (153269353277).

397729287235 is a wasteful number, since it uses less digits than its factorization.

397729287235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28863.

The product of its digits is 80015040, while the sum is 64.

The spelling of 397729287235 in words is "three hundred ninety-seven billion, seven hundred twenty-nine million, two hundred eighty-seven thousand, two hundred thirty-five".