40311232 has 42 divisors (see below), whose sum is σ = 86642448. Its totient is φ = 18600192.

The previous prime is 40311211. The next prime is 40311239. The reversal of 40311232 is 23211304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40311239) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 8953 + ... + 12679.

Almost surely, 2^40311232 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 40311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43321224).

40311232 is an abundant number, since it is smaller than the sum of its proper divisors (46331216).

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

40311232 is a wasteful number, since it uses less digits than its factorization.

40311232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765 (or 3742 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40311232 is about 6349.1126939124. The cubic root of 40311232 is about 342.8798974316.

Adding to 40311232 its reverse (23211304), we get a palindrome (63522536).

The spelling of 40311232 in words is "forty million, three hundred eleven thousand, two hundred thirty-two".