40031893 has 8 divisors (see below), whose sum is σ = 43804800. Its totient is φ = 36281280.

The previous prime is 40031869. The next prime is 40031899. The reversal of 40031893 is 39813004.

40031893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40031893 - 2¹³ = 40023701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40031899) by changing a digit.

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, 1693 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (5475600).

Almost surely, 2^40031893 is an apocalyptic number.

It is an amenable number.

40031893 is a deficient number, since it is larger than the sum of its proper divisors (3772907).

40031893 is a wasteful number, since it uses less digits than its factorization.

40031893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11147.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40031893 is about 6327.0761809860. The cubic root of 40031893 is about 342.0860589602.

Adding to 40031893 its reverse (39813004), we get a palindrome (79844897).

The spelling of 40031893 in words is "forty million, thirty-one thousand, eight hundred ninety-three".