385221652 has 12 divisors (see below), whose sum is σ = 692358100. Its totient is φ = 187405056.

The previous prime is 385221611. The next prime is 385221671. The reversal of 385221652 is 256122583.

It can be written as a sum of positive squares in 2 ways, for example, as 352913796 + 32307856 = 18786^2 + 5684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1301277 + ... + 1301572.

Almost surely, 2^385221652 is an apocalyptic number.

It is an amenable number.

385221652 is a deficient number, since it is larger than the sum of its proper divisors (307136448).

385221652 is a wasteful number, since it uses less digits than its factorization.

385221652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602890 (or 2602888 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 385221652 is about 19627.0642735994. The cubic root of 385221652 is about 727.6182159700.

The spelling of 385221652 in words is "three hundred eighty-five million, two hundred twenty-one thousand, six hundred fifty-two".