40231232 has 56 divisors (see below), whose sum is σ = 84319872. Its totient is φ = 19008000.

The previous prime is 40231199. The next prime is 40231237. The reversal of 40231232 is 23213204.

It is a self number, because there is not a number n which added to its sum of digits gives 40231232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231237) 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, 222182 + ... + 222362.

It is an arithmetic number, because the mean of its divisors is an integer number (1505712).

Almost surely, 2^40231232 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 40231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42159936).

40231232 is an abundant number, since it is smaller than the sum of its proper divisors (44088640).

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

40231232 is a wasteful number, since it uses less digits than its factorization.

40231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40231232 is about 6342.8094721503. The cubic root of 40231232 is about 342.6529254753.

Adding to 40231232 its reverse (23213204), we get a palindrome (63444436).

The spelling of 40231232 in words is "forty million, two hundred thirty-one thousand, two hundred thirty-two".