40024432 has 40 divisors (see below), whose sum is σ = 89137152. Its totient is φ = 17054400.

The previous prime is 40024423. The next prime is 40024433. The reversal of 40024432 is 23442004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40024433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20457 + ... + 22327.

Almost surely, 2^40024432 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 40024432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44568576).

40024432 is an abundant number, since it is smaller than the sum of its proper divisors (49112720).

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

40024432 is a wasteful number, since it uses less digits than its factorization.

40024432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077 (or 2071 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40024432 is about 6326.4865446786. The cubic root of 40024432 is about 342.0648053840.

Adding to 40024432 its reverse (23442004), we get a palindrome (63466436).

The spelling of 40024432 in words is "forty million, twenty-four thousand, four hundred thirty-two".