40311432 has 80 divisors (see below), whose sum is σ = 129053760. Its totient is φ = 11516256.

The previous prime is 40311431. The next prime is 40311443. The reversal of 40311432 is 23411304.

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

It is not an unprimeable number, because it can be changed into a prime (40311431) 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 19 ways as a sum of consecutive naturals, for example, 93 + ... + 8979.

It is an arithmetic number, because the mean of its divisors is an integer number (1613172).

Almost surely, 2^40311432 is an apocalyptic number.

40311432 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40311432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64526880).

40311432 is an abundant number, since it is smaller than the sum of its proper divisors (88742328).

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

40311432 is a wasteful number, since it uses less digits than its factorization.

40311432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912 (or 8899 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40311432 is about 6349.1284441252. The cubic root of 40311432 is about 342.8804644850.

Adding to 40311432 its reverse (23411304), we get a palindrome (63722736).

The spelling of 40311432 in words is "forty million, three hundred eleven thousand, four hundred thirty-two".