40031232 has 88 divisors (see below), whose sum is σ = 108671136. Its totient is φ = 13099008.

The previous prime is 40031213. The next prime is 40031239. The reversal of 40031232 is 23213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40031239) 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, 254898 + ... + 255054.

Almost surely, 2^40031232 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 40031232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54335568).

40031232 is an abundant number, since it is smaller than the sum of its proper divisors (68639904).

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

40031232 is a wasteful number, since it uses less digits than its factorization.

40031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40031232 is about 6327.0239449523. The cubic root of 40031232 is about 342.0841761270.

Adding to 40031232 its reverse (23213004), we get a palindrome (63244236).

The spelling of 40031232 in words is "forty million, thirty-one thousand, two hundred thirty-two".