385656583 has 4 divisors (see below), whose sum is σ = 415322488. Its totient is φ = 355990680.

The previous prime is 385656559. The next prime is 385656589.

It is a happy number.

385656583 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 385656583 - 2⁹ = 385656071 is a prime.

It is a super-2 number, since 2×385656583² = 297462000022471778, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385656589) 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 3 ways as a sum of consecutive naturals, for example, 14832933 + ... + 14832958.

It is an arithmetic number, because the mean of its divisors is an integer number (103830622).

Almost surely, 2^385656583 is an apocalyptic number.

385656583 is a deficient number, since it is larger than the sum of its proper divisors (29665905).

385656583 is a wasteful number, since it uses less digits than its factorization.

385656583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29665904.

The product of its digits is 2592000, while the sum is 49.

The square root of 385656583 is about 19638.1410270932. The cubic root of 385656583 is about 727.8919498849.

The spelling of 385656583 in words is "three hundred eighty-five million, six hundred fifty-six thousand, five hundred eighty-three".