6420016 has 20 divisors (see below), whose sum is σ = 13171032. Its totient is φ = 3021056.

The previous prime is 6419989. The next prime is 6420023. The reversal of 6420016 is 6100246.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6419975 and 6420002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11530 + ... + 12073.

Almost surely, 2^6420016 is an apocalyptic number.

6420016 is the 1603-rd centered pentagonal number.

It is an amenable number.

6420016 is an abundant number, since it is smaller than the sum of its proper divisors (6751016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6420016 is a wasteful number, since it uses less digits than its factorization.

6420016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23628 (or 23622 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 6420016 is about 2533.7750492102. The cubic root of 6420016 is about 185.8569061684.

The spelling of 6420016 in words is "six million, four hundred twenty thousand, sixteen".