40188673 has 6 divisors (see below), whose sum is σ = 46750146. Its totient is φ = 34447392.

The previous prime is 40188671. The next prime is 40188689. The reversal of 40188673 is 37688104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 34656769 + 5531904 = 5887^2 + 2352^2 .

It is not a de Polignac number, because 40188673 - 2¹ = 40188671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40188671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 410040 + ... + 410137.

It is an arithmetic number, because the mean of its divisors is an integer number (7791691).

Almost surely, 2^40188673 is an apocalyptic number.

It is an amenable number.

40188673 is a deficient number, since it is larger than the sum of its proper divisors (6561473).

40188673 is an equidigital number, since it uses as much as digits as its factorization.

40188673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820191 (or 820184 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 40188673 is about 6339.4536830866. The cubic root of 40188673 is about 342.5320566014.

The spelling of 40188673 in words is "forty million, one hundred eighty-eight thousand, six hundred seventy-three".