384763821 has 24 divisors (see below), whose sum is σ = 561824640. Its totient is φ = 234089856.

The previous prime is 384763811. The next prime is 384763823. The reversal of 384763821 is 128367483.

It is not a de Polignac number, because 384763821 - 2⁷ = 384763693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384763823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40860 + ... + 49386.

It is an arithmetic number, because the mean of its divisors is an integer number (23409360).

Almost surely, 2^384763821 is an apocalyptic number.

It is an amenable number.

384763821 is a deficient number, since it is larger than the sum of its proper divisors (177060819).

384763821 is a wasteful number, since it uses less digits than its factorization.

384763821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645 (or 8632 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 384763821 is about 19615.3975488645. The cubic root of 384763821 is about 727.3298467216.

The spelling of 384763821 in words is "three hundred eighty-four million, seven hundred sixty-three thousand, eight hundred twenty-one".