40031240 has 32 divisors (see below), whose sum is σ = 90305280. Its totient is φ = 15970752.

The previous prime is 40031239. The next prime is 40031269. The reversal of 40031240 is 4213004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17609 + ... + 19751.

It is an arithmetic number, because the mean of its divisors is an integer number (2822040).

Almost surely, 2^40031240 is an apocalyptic number.

40031240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40031240 is an abundant number, since it is smaller than the sum of its proper divisors (50274040).

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

40031240 is a wasteful number, since it uses less digits than its factorization.

40031240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621 (or 2617 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40031240 is about 6327.0245771611. The cubic root of 40031240 is about 342.0841989148.

Adding to 40031240 its reverse (4213004), we get a palindrome (44244244).

The spelling of 40031240 in words is "forty million, thirty-one thousand, two hundred forty".