40868681 has 4 divisors (see below), whose sum is σ = 46707072. Its totient is φ = 35030292.

The previous prime is 40868657. The next prime is 40868687. The reversal of 40868681 is 18686804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40868681 - 2⁶ = 40868617 is a prime.

It is a super-2 number, since 2×40868681² = 3340498173359522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40868687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2919185 + ... + 2919198.

It is an arithmetic number, because the mean of its divisors is an integer number (11676768).

Almost surely, 2^40868681 is an apocalyptic number.

It is an amenable number.

40868681 is a deficient number, since it is larger than the sum of its proper divisors (5838391).

40868681 is an equidigital number, since it uses as much as digits as its factorization.

40868681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838390.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 40868681 is about 6392.8617222649. The cubic root of 40868681 is about 344.4531868479.

The spelling of 40868681 in words is "forty million, eight hundred sixty-eight thousand, six hundred eighty-one".