385724017 has 4 divisors (see below), whose sum is σ = 440827456. Its totient is φ = 330620580.

The previous prime is 385723993. The next prime is 385724021. The reversal of 385724017 is 710427583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 385724017 - 2²⁷ = 251506289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385724117) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 27551709 + ... + 27551722.

It is an arithmetic number, because the mean of its divisors is an integer number (110206864).

Almost surely, 2^385724017 is an apocalyptic number.

It is an amenable number.

385724017 is a deficient number, since it is larger than the sum of its proper divisors (55103439).

385724017 is an equidigital number, since it uses as much as digits as its factorization.

385724017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55103438.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 385724017 is about 19639.8578660845. The cubic root of 385724017 is about 727.9343726061.

The spelling of 385724017 in words is "three hundred eighty-five million, seven hundred twenty-four thousand, seventeen".