385212861 has 16 divisors (see below), whose sum is σ = 622566720. Its totient is φ = 233462160.

The previous prime is 385212853. The next prime is 385212907. The reversal of 385212861 is 168212583.

It is a happy number.

385212861 is a `hidden beast` number, since 385 + 212 + 8 + 61 = 666.

It is not a de Polignac number, because 385212861 - 2³ = 385212853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385212161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 648210 + ... + 648803.

It is an arithmetic number, because the mean of its divisors is an integer number (38910420).

Almost surely, 2^385212861 is an apocalyptic number.

It is an amenable number.

385212861 is a deficient number, since it is larger than the sum of its proper divisors (237353859).

385212861 is a wasteful number, since it uses less digits than its factorization.

385212861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297033 (or 1297027 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 385212861 is about 19626.8403213559. The cubic root of 385212861 is about 727.6126810263.

The spelling of 385212861 in words is "three hundred eighty-five million, two hundred twelve thousand, eight hundred sixty-one".