6442432 has 28 divisors (see below), whose sum is σ = 13087096. Its totient is φ = 3144960.

The previous prime is 6442427. The next prime is 6442433. The reversal of 6442432 is 2342446.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6442397 and 6442406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442433) 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, 1582 + ... + 3922.

Almost surely, 2^6442432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6543548).

6442432 is an abundant number, since it is smaller than the sum of its proper divisors (6644664).

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

6442432 is a wasteful number, since it uses less digits than its factorization.

6442432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396 (or 2386 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 6442432 is about 2538.1946339869. The cubic root of 6442432 is about 186.0729663234.

Adding to 6442432 its reverse (2342446), we get a palindrome (8784878).

The spelling of 6442432 in words is "six million, four hundred forty-two thousand, four hundred thirty-two".