40188443 has 2 divisors, whose sum is σ = 40188444. Its totient is φ = 40188442.

The previous prime is 40188427. The next prime is 40188497. The reversal of 40188443 is 34488104.

40188443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40188443 - 2⁴ = 40188427 is a prime.

It is a super-2 number, since 2×40188443² = 3230221901528498, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40188413) 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 as a sum of consecutive naturals, namely, 20094221 + 20094222.

It is an arithmetic number, because the mean of its divisors is an integer number (20094222).

Almost surely, 2^40188443 is an apocalyptic number.

40188443 is a deficient number, since it is larger than the sum of its proper divisors (1).

40188443 is an equidigital number, since it uses as much as digits as its factorization.

40188443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 40188443 is about 6339.4355426962. The cubic root of 40188443 is about 342.5314031625.

The spelling of 40188443 in words is "forty million, one hundred eighty-eight thousand, four hundred forty-three".