385924221 has 12 divisors (see below), whose sum is σ = 565767072. Its totient is φ = 253442376.

The previous prime is 385924207. The next prime is 385924223. The reversal of 385924221 is 122429583.

It is a happy number.

385924221 is a `hidden beast` number, since 3 + 8 + 592 + 42 + 21 = 666.

It is not a de Polignac number, because 385924221 - 2⁷ = 385924093 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385924223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319401 + ... + 320606.

It is an arithmetic number, because the mean of its divisors is an integer number (47147256).

Almost surely, 2^385924221 is an apocalyptic number.

It is an amenable number.

385924221 is a deficient number, since it is larger than the sum of its proper divisors (179842851).

385924221 is a wasteful number, since it uses less digits than its factorization.

385924221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640080 (or 640077 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 385924221 is about 19644.9540849553. The cubic root of 385924221 is about 728.0602917954.

The spelling of 385924221 in words is "three hundred eighty-five million, nine hundred twenty-four thousand, two hundred twenty-one".