40189723 has 4 divisors (see below), whose sum is σ = 45931120. Its totient is φ = 34448328.

The previous prime is 40189711. The next prime is 40189727. The reversal of 40189723 is 32798104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40189723 - 2¹⁷ = 40058651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40189727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2870688 + ... + 2870701.

It is an arithmetic number, because the mean of its divisors is an integer number (11482780).

Almost surely, 2^40189723 is an apocalyptic number.

40189723 is a deficient number, since it is larger than the sum of its proper divisors (5741397).

40189723 is an equidigital number, since it uses as much as digits as its factorization.

40189723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741396.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 40189723 is about 6339.5364972528. The cubic root of 40189723 is about 342.5350396602.

The spelling of 40189723 in words is "forty million, one hundred eighty-nine thousand, seven hundred twenty-three".