40573981 has 8 divisors (see below), whose sum is σ = 46666880. Its totient is φ = 34555248.

The previous prime is 40573957. The next prime is 40574003. The reversal of 40573981 is 18937504.

40573981 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 not a de Polignac number, because 40573981 - 2⁹ = 40573469 is a prime.

It is a super-2 number, since 2×40573981² = 3292495868376722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40573981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40576981) 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, 17361 + ... + 19558.

It is an arithmetic number, because the mean of its divisors is an integer number (5833360).

Almost surely, 2^40573981 is an apocalyptic number.

It is an amenable number.

40573981 is a deficient number, since it is larger than the sum of its proper divisors (6092899).

40573981 is a wasteful number, since it uses less digits than its factorization.

40573981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37083.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 40573981 is about 6369.7708750001. The cubic root of 40573981 is about 343.6232495337.

The spelling of 40573981 in words is "forty million, five hundred seventy-three thousand, nine hundred eighty-one".