40386866 has 16 divisors (see below), whose sum is σ = 69078744. Its totient is φ = 17543424.

The previous prime is 40386839. The next prime is 40386881. The reversal of 40386866 is 66868304.

It can be written as a sum of positive squares in 4 ways, for example, as 40056241 + 330625 = 6329^2 + 575^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45245 + ... + 46128.

Almost surely, 2^40386866 is an apocalyptic number.

40386866 is a deficient number, since it is larger than the sum of its proper divisors (28691878).

40386866 is a wasteful number, since it uses less digits than its factorization.

40386866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91405.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 40386866 is about 6355.0661680269. The cubic root of 40386866 is about 343.0942064019.

The spelling of 40386866 in words is "forty million, three hundred eighty-six thousand, eight hundred sixty-six".