40687866 has 32 divisors (see below), whose sum is σ = 90691200. Its totient is φ = 13521600.

The previous prime is 40687859. The next prime is 40687891. The reversal of 40687866 is 66878604.

It is a happy number.

It is a super-3 number, since 3×40687866³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20715 + ... + 22593.

It is an arithmetic number, because the mean of its divisors is an integer number (2834100).

Almost surely, 2^40687866 is an apocalyptic number.

40687866 is an abundant number, since it is smaller than the sum of its proper divisors (50003334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40687866 is a wasteful number, since it uses less digits than its factorization.

40687866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 40687866 is about 6378.7041003640. The cubic root of 40687866 is about 343.9444486194.

The spelling of 40687866 in words is "forty million, six hundred eighty-seven thousand, eight hundred sixty-six".