6403632 has 40 divisors (see below), whose sum is σ = 16784640. Its totient is φ = 2103360.

The previous prime is 6403601. The next prime is 6403643. The reversal of 6403632 is 2363046.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2469 + ... + 4347.

It is an arithmetic number, because the mean of its divisors is an integer number (419616).

Almost surely, 2^6403632 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 6403632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8392320).

6403632 is an abundant number, since it is smaller than the sum of its proper divisors (10381008).

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

6403632 is a wasteful number, since it uses less digits than its factorization.

6403632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961 (or 1955 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 6403632 is about 2530.5398633493. The cubic root of 6403632 is about 185.6986680583.

Adding to 6403632 its reverse (2363046), we get a palindrome (8766678).

The spelling of 6403632 in words is "six million, four hundred three thousand, six hundred thirty-two".