40432 has 30 divisors (see below), whose sum is σ = 94488. Its totient is φ = 16416.

The previous prime is 40429. The next prime is 40433. The reversal of 40432 is 23404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2119 + ... + 2137.

2⁴⁰⁴³² 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 40432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47244).

40432 is an abundant number, since it is smaller than the sum of its proper divisors (54056).

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

40432 is a wasteful number, since it uses less digits than its factorization.

40432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40432 is about 201.0770996409. The cubic root of 40432 is about 34.3221966163.

Adding to 40432 its reverse (23404), we get a palindrome (63836).

The spelling of 40432 in words is "forty thousand, four hundred thirty-two".