40031724 has 24 divisors (see below), whose sum is σ = 93523248. Its totient is φ = 13327360.

The previous prime is 40031713. The next prime is 40031729. The reversal of 40031724 is 42713004.

It is a self number, because there is not a number n which added to its sum of digits gives 40031724.

It is not an unprimeable number, because it can be changed into a prime (40031729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11644 + ... + 14684.

It is an arithmetic number, because the mean of its divisors is an integer number (3896802).

Almost surely, 2^40031724 is an apocalyptic number.

It is an amenable number.

40031724 is an abundant number, since it is smaller than the sum of its proper divisors (53491524).

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

40031724 is a wasteful number, since it uses less digits than its factorization.

40031724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145 (or 4143 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40031724 is about 6327.0628256720. The cubic root of 40031724 is about 342.0855775721.

Adding to 40031724 its reverse (42713004), we get a palindrome (82744728).

It can be divided in two parts, 40031 and 724, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 40031724 in words is "forty million, thirty-one thousand, seven hundred twenty-four".