6403620432 has 160 divisors (see below), whose sum is σ = 18283829760. Its totient is φ = 1915200000.

The previous prime is 6403620389. The next prime is 6403620481. The reversal of 6403620432 is 2340263046.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6403620432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25512307 + ... + 25512557.

It is an arithmetic number, because the mean of its divisors is an integer number (114273936).

Almost surely, 2^6403620432 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 6403620432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9141914880).

6403620432 is an abundant number, since it is smaller than the sum of its proper divisors (11880209328).

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

6403620432 is a wasteful number, since it uses less digits than its factorization.

6403620432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 6403620432 is about 80022.6245008248. The cubic root of 6403620432 is about 1856.9855623827.

Adding to 6403620432 its reverse (2340263046), we get a palindrome (8743883478).

The spelling of 6403620432 in words is "six billion, four hundred three million, six hundred twenty thousand, four hundred thirty-two".