6420432 has 40 divisors (see below), whose sum is σ = 16700320. Its totient is φ = 2125440.

The previous prime is 6420431. The next prime is 6420437. The reversal of 6420432 is 2340246.

It is a junction number, because it is equal to n+sod(n) for n = 6420399 and 6420408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8319 + ... + 9057.

It is an arithmetic number, because the mean of its divisors is an integer number (417508).

Almost surely, 2^6420432 is an apocalyptic number.

It is an amenable number.

6420432 is an abundant number, since it is smaller than the sum of its proper divisors (10279888).

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

6420432 is a wasteful number, since it uses less digits than its factorization.

6420432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 6420432 is about 2533.8571388300. The cubic root of 6420432 is about 185.8609204265.

Adding to 6420432 its reverse (2340246), we get a palindrome (8760678).

The spelling of 6420432 in words is "six million, four hundred twenty thousand, four hundred thirty-two".