40503240 has 128 divisors (see below), whose sum is σ = 136972800. Its totient is φ = 10777536.

The previous prime is 40503233. The next prime is 40503251. The reversal of 40503240 is 4230504.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 87249 + ... + 87711.

It is an arithmetic number, because the mean of its divisors is an integer number (1070100).

Almost surely, 2^40503240 is an apocalyptic number.

40503240 is a gapful number since it is divisible by the number (40) 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 40503240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68486400).

40503240 is an abundant number, since it is smaller than the sum of its proper divisors (96469560).

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

40503240 is an equidigital number, since it uses as much as digits as its factorization.

40503240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 473 counting only the distinct ones).

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

The square root of 40503240 is about 6364.2155840292. The cubic root of 40503240 is about 343.4234302357.

Adding to 40503240 its reverse (4230504), we get a palindrome (44733744).

The spelling of 40503240 in words is "forty million, five hundred three thousand, two hundred forty".