6404620 has 24 divisors (see below), whose sum is σ = 13532400. Its totient is φ = 2546112.

The previous prime is 6404611. The next prime is 6404623. The reversal of 6404620 is 264046.

It is a junction number, because it is equal to n+sod(n) for n = 6404591 and 6404600.

It is not an unprimeable number, because it can be changed into a prime (6404623) 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, 2686 + ... + 4474.

It is an arithmetic number, because the mean of its divisors is an integer number (563850).

Almost surely, 2^6404620 is an apocalyptic number.

It is an amenable number.

6404620 is an abundant number, since it is smaller than the sum of its proper divisors (7127780).

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

6404620 is a wasteful number, since it uses less digits than its factorization.

6404620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 6404620 is about 2530.7350710811. The cubic root of 6404620 is about 185.7082178914.

Adding to 6404620 its reverse (264046), we get a palindrome (6668666).

The spelling of 6404620 in words is "six million, four hundred four thousand, six hundred twenty".