40043432 has 128 divisors (see below), whose sum is σ = 97977600. Its totient is φ = 15052800.

The previous prime is 40043417. The next prime is 40043467. The reversal of 40043432 is 23434004.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 563957 + ... + 564027.

It is an arithmetic number, because the mean of its divisors is an integer number (765450).

Almost surely, 2^40043432 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 40043432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48988800).

40043432 is an abundant number, since it is smaller than the sum of its proper divisors (57934168).

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

40043432 is a wasteful number, since it uses less digits than its factorization.

40043432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40043432 is about 6327.9879898748. The cubic root of 40043432 is about 342.1189240213.

Adding to 40043432 its reverse (23434004), we get a palindrome (63477436).

The spelling of 40043432 in words is "forty million, forty-three thousand, four hundred thirty-two".