6421384 has 16 divisors (see below), whose sum is σ = 12067020. Its totient is φ = 3203520.

The previous prime is 6421369. The next prime is 6421403. The reversal of 6421384 is 4831246.

It can be written as a sum of positive squares in 2 ways, for example, as 6140484 + 280900 = 2478^2 + 530^2 .

It is a d-powerful number, because it can be written as 6 + 4⁸ + 2¹⁹ + 1 + 3¹⁴ + 8 + 4¹⁰ .

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, 6354 + ... + 7294.

Almost surely, 2^6421384 is an apocalyptic number.

It is an amenable number.

6421384 is a deficient number, since it is larger than the sum of its proper divisors (5645636).

6421384 is a wasteful number, since it uses less digits than its factorization.

6421384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1796 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 6421384 is about 2534.0449877617. The cubic root of 6421384 is about 185.8701062493.

The spelling of 6421384 in words is "six million, four hundred twenty-one thousand, three hundred eighty-four".