40027861 has 2 divisors, whose sum is σ = 40027862. Its totient is φ = 40027860.

The previous prime is 40027853. The next prime is 40027873. The reversal of 40027861 is 16872004.

40027861 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 can be written as a sum of positive squares in only one way, i.e., 39564100 + 463761 = 6290^2 + 681^2 .

It is a cyclic number.

It is not a de Polignac number, because 40027861 - 2³ = 40027853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40027261) 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, 20013930 + 20013931.

It is an arithmetic number, because the mean of its divisors is an integer number (20013931).

Almost surely, 2^40027861 is an apocalyptic number.

It is an amenable number.

40027861 is a deficient number, since it is larger than the sum of its proper divisors (1).

40027861 is an equidigital number, since it uses as much as digits as its factorization.

40027861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 40027861 is about 6326.7575423751. The cubic root of 40027861 is about 342.0745736402.

Adding to 40027861 its reverse (16872004), we get a palindrome (56899865).

The spelling of 40027861 in words is "forty million, twenty-seven thousand, eight hundred sixty-one".