40131240 has 32 divisors (see below), whose sum is σ = 120394080. Its totient is φ = 10701632.

The previous prime is 40131233. The next prime is 40131253. The reversal of 40131240 is 4213104.

It is a super-2 number, since 2×40131240² = 3221032847875200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 7 ways as a sum of consecutive naturals, for example, 167094 + ... + 167333.

It is an arithmetic number, because the mean of its divisors is an integer number (3762315).

Almost surely, 2^40131240 is an apocalyptic number.

40131240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40131240 is an abundant number, since it is smaller than the sum of its proper divisors (80262840).

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

40131240 is a wasteful number, since it uses less digits than its factorization.

40131240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334441 (or 334437 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40131240 is about 6334.9222568237. The cubic root of 40131240 is about 342.3688097553.

Adding to 40131240 its reverse (4213104), we get a palindrome (44344344).

It can be divided in two parts, 4013 and 1240, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 40131240 in words is "forty million, one hundred thirty-one thousand, two hundred forty".