385664069 has 16 divisors (see below), whose sum is σ = 475787520. Its totient is φ = 305289600.

The previous prime is 385664051. The next prime is 385664099. The reversal of 385664069 is 960466583.

It is not a de Polignac number, because 385664069 - 2⁸ = 385663813 is a prime.

It is a super-2 number, since 2×385664069² = 297473548235273522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385664009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36632 + ... + 45969.

It is an arithmetic number, because the mean of its divisors is an integer number (29736720).

Almost surely, 2^385664069 is an apocalyptic number.

It is an amenable number.

385664069 is a deficient number, since it is larger than the sum of its proper divisors (90123451).

385664069 is a wasteful number, since it uses less digits than its factorization.

385664069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82660.

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 385664069 is about 19638.3316246569. The cubic root of 385664069 is about 727.8966595706.

The spelling of 385664069 in words is "three hundred eighty-five million, six hundred sixty-four thousand, sixty-nine".