386840069 has 16 divisors (see below), whose sum is σ = 495332736. Its totient is φ = 293284800.

The previous prime is 386840063. The next prime is 386840081. The reversal of 386840069 is 960048683.

It is a cyclic number.

It is not a de Polignac number, because 386840069 - 2¹⁶ = 386774533 is a prime.

It is a super-3 number, since 3×386840069³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386840063) 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, 65042 + ... + 70739.

It is an arithmetic number, because the mean of its divisors is an integer number (30958296).

Almost surely, 2^386840069 is an apocalyptic number.

It is an amenable number.

386840069 is a deficient number, since it is larger than the sum of its proper divisors (108492667).

386840069 is a wasteful number, since it uses less digits than its factorization.

386840069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135836.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 386840069 is about 19668.2502780496. The cubic root of 386840069 is about 728.6357638342.

The spelling of 386840069 in words is "three hundred eighty-six million, eight hundred forty thousand, sixty-nine".