6443420 has 12 divisors (see below), whose sum is σ = 13531224. Its totient is φ = 2577360.

The previous prime is 6443417. The next prime is 6443429. The reversal of 6443420 is 243446.

It is a happy number.

It is a super-2 number, since 2×6443420² = 83035322592800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161066 + ... + 161105.

It is an arithmetic number, because the mean of its divisors is an integer number (1127602).

Almost surely, 2^6443420 is an apocalyptic number.

It is an amenable number.

6443420 is an abundant number, since it is smaller than the sum of its proper divisors (7087804).

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

6443420 is a wasteful number, since it uses less digits than its factorization.

6443420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322180 (or 322178 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 6443420 is about 2538.3892530501. The cubic root of 6443420 is about 186.0824777778.

Adding to 6443420 its reverse (243446), we get a palindrome (6686866).

The spelling of 6443420 in words is "six million, four hundred forty-three thousand, four hundred twenty".