40885861 has 2 divisors, whose sum is σ = 40885862. Its totient is φ = 40885860.

The previous prime is 40885849. The next prime is 40885907. The reversal of 40885861 is 16858804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 19633761 = 4610^2 + 4431^2 .

It is a cyclic number.

It is not a de Polignac number, because 40885861 - 2⁵ = 40885829 is a prime.

It is a super-2 number, since 2×40885861² = 3343307259422642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40885811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20442930 + 20442931.

It is an arithmetic number, because the mean of its divisors is an integer number (20442931).

Almost surely, 2^40885861 is an apocalyptic number.

It is an amenable number.

40885861 is a deficient number, since it is larger than the sum of its proper divisors (1).

40885861 is an equidigital number, since it uses as much as digits as its factorization.

40885861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 40885861 is about 6394.2052672713. The cubic root of 40885861 is about 344.5014461065.

The spelling of 40885861 in words is "forty million, eight hundred eighty-five thousand, eight hundred sixty-one".