386821028 has 18 divisors (see below), whose sum is σ = 744071958. Its totient is φ = 175827520.

The previous prime is 386820989. The next prime is 386821037. The reversal of 386821028 is 820128683.

It can be written as a sum of positive squares in only one way, i.e., 239878144 + 146942884 = 15488^2 + 12122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 386820982 and 386821000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399125 + ... + 400092.

It is an arithmetic number, because the mean of its divisors is an integer number (41337331).

Almost surely, 2^386821028 is an apocalyptic number.

It is an amenable number.

386821028 is a deficient number, since it is larger than the sum of its proper divisors (357250930).

386821028 is a wasteful number, since it uses less digits than its factorization.

386821028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799243 (or 799230 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 386821028 is about 19667.7662178500. The cubic root of 386821028 is about 728.6238086945.

The spelling of 386821028 in words is "three hundred eighty-six million, eight hundred twenty-one thousand, twenty-eight".