6400432 has 20 divisors (see below), whose sum is σ = 13130856. Its totient is φ = 3011840.

The previous prime is 6400423. The next prime is 6400451. The reversal of 6400432 is 2340046.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11494 + ... + 12037.

Almost surely, 2^6400432 is an apocalyptic number.

It is an amenable number.

6400432 is an abundant number, since it is smaller than the sum of its proper divisors (6730424).

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

6400432 is a wasteful number, since it uses less digits than its factorization.

6400432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23556 (or 23550 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 6400432 is about 2529.9075081908. The cubic root of 6400432 is about 185.6677306805.

Adding to 6400432 its reverse (2340046), we get a palindrome (8740478).

The spelling of 6400432 in words is "six million, four hundred thousand, four hundred thirty-two".