386869561 has 27 divisors (see below), whose sum is σ = 450065991. Its totient is φ = 332327424.

The previous prime is 386869537. The next prime is 386869589. The reversal of 386869561 is 165968683.

The square root of 386869561 is 19669.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 339259561 + 47610000 = 18419^2 + 6900^2 .

It is not a de Polignac number, because 386869561 - 2²⁵ = 353315129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 386869499 and 386869508.

It is not an unprimeable number, because it can be changed into a prime (386869261) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4346805 + ... + 4346893.

Almost surely, 2^386869561 is an apocalyptic number.

386869561 is the 19669-th square number.

386869561 is the 9835-th centered octagonal number.

It is an amenable number.

386869561 is a deficient number, since it is larger than the sum of its proper divisors (63196430).

386869561 is an equidigital number, since it uses as much as digits as its factorization.

386869561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 119 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The cubic root of 386869561 is about 728.6542799960.

The spelling of 386869561 in words is "three hundred eighty-six million, eight hundred sixty-nine thousand, five hundred sixty-one".