384411821 has 8 divisors (see below), whose sum is σ = 390463488. Its totient is φ = 378378000.

The previous prime is 384411817. The next prime is 384411823. The reversal of 384411821 is 128114483.

It is a happy number.

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 384411821 - 2² = 384411817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384411823) 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, 42836 + ... + 51026.

It is an arithmetic number, because the mean of its divisors is an integer number (48807936).

Almost surely, 2^384411821 is an apocalyptic number.

It is an amenable number.

384411821 is a deficient number, since it is larger than the sum of its proper divisors (6051667).

384411821 is an equidigital number, since it uses as much as digits as its factorization.

384411821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923.

The product of its digits is 6144, while the sum is 32.

The square root of 384411821 is about 19606.4229526959. The cubic root of 384411821 is about 727.1079805578.

The spelling of 384411821 in words is "three hundred eighty-four million, four hundred eleven thousand, eight hundred twenty-one".