385867821 has 8 divisors (see below), whose sum is σ = 514590624. Its totient is φ = 257195120.

The previous prime is 385867813. The next prime is 385867829. The reversal of 385867821 is 128768583.

It is an interprime number because it is at equal distance from previous prime (385867813) and next prime (385867829).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 385867821 - 2³ = 385867813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385867829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12715 + ... + 30551.

It is an arithmetic number, because the mean of its divisors is an integer number (64323828).

Almost surely, 2^385867821 is an apocalyptic number.

It is an amenable number.

385867821 is a deficient number, since it is larger than the sum of its proper divisors (128722803).

385867821 is a wasteful number, since it uses less digits than its factorization.

385867821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25051.

The product of its digits is 645120, while the sum is 48.

The square root of 385867821 is about 19643.5185493842. The cubic root of 385867821 is about 728.0248231734.

The spelling of 385867821 in words is "three hundred eighty-five million, eight hundred sixty-seven thousand, eight hundred twenty-one".