6420830 has 16 divisors (see below), whose sum is σ = 12446784. Its totient is φ = 2370720.

The previous prime is 6420823. The next prime is 6420833. The reversal of 6420830 is 380246.

It is a happy number.

6420830 is nontrivially palindromic in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 6420796 and 6420805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420833) 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, 24566 + ... + 24825.

It is an arithmetic number, because the mean of its divisors is an integer number (777924).

Almost surely, 2^6420830 is an apocalyptic number.

6420830 is a deficient number, since it is larger than the sum of its proper divisors (6025954).

6420830 is a wasteful number, since it uses less digits than its factorization.

6420830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49411.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6420830 is about 2533.9356740060. The cubic root of 6420830 is about 185.8647608284.

The spelling of 6420830 in words is "six million, four hundred twenty thousand, eight hundred thirty".