40031836 has 24 divisors (see below), whose sum is σ = 75637184. Its totient is φ = 18429120.

The previous prime is 40031807. The next prime is 40031843. The reversal of 40031836 is 63813004.

40031836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40031836.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27421 + ... + 28843.

Almost surely, 2^40031836 is an apocalyptic number.

It is an amenable number.

40031836 is a deficient number, since it is larger than the sum of its proper divisors (35605348).

40031836 is a wasteful number, since it uses less digits than its factorization.

40031836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40031836 is about 6327.0716765341. The cubic root of 40031836 is about 342.0858965987.

The spelling of 40031836 in words is "forty million, thirty-one thousand, eight hundred thirty-six".