40040831 has 8 divisors (see below), whose sum is σ = 42452064. Its totient is φ = 37635840.

The previous prime is 40040813. The next prime is 40040839. The reversal of 40040831 is 13804004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40040831 - 2¹⁴ = 40024447 is a prime.

It is a super-2 number, since 2×40040831² = 3206536294341122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21566 + ... + 23348.

It is an arithmetic number, because the mean of its divisors is an integer number (5306508).

Almost surely, 2^40040831 is an apocalyptic number.

40040831 is a deficient number, since it is larger than the sum of its proper divisors (2411233).

40040831 is a wasteful number, since it uses less digits than its factorization.

40040831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40040831 is about 6327.7824709767. The cubic root of 40040831 is about 342.1115164762. Note that the first 3 decimals are identical.

Adding to 40040831 its reverse (13804004), we get a palindrome (53844835).

The spelling of 40040831 in words is "forty million, forty thousand, eight hundred thirty-one".