40646881 has 8 divisors (see below), whose sum is σ = 46950624. Its totient is φ = 34777920.

The previous prime is 40646849. The next prime is 40646887. The reversal of 40646881 is 18864604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40646881 - 2⁵ = 40646849 is a prime.

It is a super-2 number, since 2×40646881² = 3304337870056322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40646881.

It is not an unprimeable number, because it can be changed into a prime (40646887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108495 + ... + 108868.

It is an arithmetic number, because the mean of its divisors is an integer number (5868828).

Almost surely, 2^40646881 is an apocalyptic number.

It is an amenable number.

40646881 is a deficient number, since it is larger than the sum of its proper divisors (6303743).

40646881 is a wasteful number, since it uses less digits than its factorization.

40646881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217391.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 40646881 is about 6375.4906477855. The cubic root of 40646881 is about 343.8289244232.

The spelling of 40646881 in words is "forty million, six hundred forty-six thousand, eight hundred eighty-one".