385638228 has 18 divisors (see below), whose sum is σ = 974807834. Its totient is φ = 128546064.

The previous prime is 385638221. The next prime is 385638241. The reversal of 385638228 is 822836583.

385638228 is a `hidden beast` number, since 3 + 8 + 5 + 638 + 2 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 377447184 + 8191044 = 19428^2 + 2862^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385638221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5356051 + ... + 5356122.

Almost surely, 2^385638228 is an apocalyptic number.

It is an amenable number.

385638228 is an abundant number, since it is smaller than the sum of its proper divisors (589169606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385638228 is a wasteful number, since it uses less digits than its factorization.

385638228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10712183 (or 10712178 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 385638228 is about 19637.6736911478. The cubic root of 385638228 is about 727.8804019004.

The spelling of 385638228 in words is "three hundred eighty-five million, six hundred thirty-eight thousand, two hundred twenty-eight".