40620181 has 8 divisors (see below), whose sum is σ = 46473984. Its totient is φ = 34779120.

The previous prime is 40620169. The next prime is 40620187. The reversal of 40620181 is 18102604.

40620181 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 40620181 - 2⁹ = 40619669 is a prime.

It is a super-2 number, since 2×40620181² = 3299998208945522, 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 (40620187) 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, 5091 + ... + 10351.

It is an arithmetic number, because the mean of its divisors is an integer number (5809248).

Almost surely, 2^40620181 is an apocalyptic number.

It is an amenable number.

40620181 is a deficient number, since it is larger than the sum of its proper divisors (5853803).

40620181 is a wasteful number, since it uses less digits than its factorization.

40620181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 40620181 is about 6373.3963473175. The cubic root of 40620181 is about 343.7536234990.

Adding to 40620181 its reverse (18102604), we get a palindrome (58722785).

The spelling of 40620181 in words is "forty million, six hundred twenty thousand, one hundred eighty-one".