40032432 has 120 divisors (see below), whose sum is σ = 123801600. Its totient is φ = 11975040.

The previous prime is 40032403. The next prime is 40032451. The reversal of 40032432 is 23423004.

It is a super-2 number, since 2×40032432² = 3205191223669248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201069 + ... + 201267.

It is an arithmetic number, because the mean of its divisors is an integer number (1031680).

Almost surely, 2^40032432 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 40032432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61900800).

40032432 is an abundant number, since it is smaller than the sum of its proper divisors (83769168).

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

40032432 is a wasteful number, since it uses less digits than its factorization.

40032432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40032432 is about 6327.1187755565. The cubic root of 40032432 is about 342.0875942657.

Adding to 40032432 its reverse (23423004), we get a palindrome (63455436).

The spelling of 40032432 in words is "forty million, thirty-two thousand, four hundred thirty-two".