40540032 has 96 divisors (see below), whose sum is σ = 125678280. Its totient is φ = 12469248.

The previous prime is 40540009. The next prime is 40540037. The reversal of 40540032 is 23004504.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×40540032² = 3286988389122048, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 40539987 and 40540014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40540037) 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 11 ways as a sum of consecutive naturals, for example, 13623 + ... + 16329.

Almost surely, 2^40540032 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 40540032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62839140).

40540032 is an abundant number, since it is smaller than the sum of its proper divisors (85138248).

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

40540032 is a wasteful number, since it uses less digits than its factorization.

40540032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2725 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 40540032 is about 6367.1054648090. The cubic root of 40540032 is about 343.5273841494.

Adding to 40540032 its reverse (23004504), we get a palindrome (63544536).

The spelling of 40540032 in words is "forty million, five hundred forty thousand, thirty-two".