4040432 has 30 divisors (see below), whose sum is σ = 8608824. Its totient is φ = 1835680.

The previous prime is 4040431. The next prime is 4040459. The reversal of 4040432 is 2340404.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4040432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040431) 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 5 ways as a sum of consecutive naturals, for example, 893 + ... + 2979.

Almost surely, 2^4040432 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 4040432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4304412).

4040432 is an abundant number, since it is smaller than the sum of its proper divisors (4568392).

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

4040432 is a wasteful number, since it uses less digits than its factorization.

4040432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2100 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 4040432 is about 2010.0825853681. The cubic root of 4040432 is about 159.2731614943.

Adding to 4040432 its reverse (2340404), we get a palindrome (6380836).

The spelling of 4040432 in words is "four million, forty thousand, four hundred thirty-two".