40918821 has 8 divisors (see below), whose sum is σ = 54678624. Its totient is φ = 27219120.

The previous prime is 40918789. The next prime is 40918831. The reversal of 40918821 is 12881904.

40918821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40918821 - 2⁵ = 40918789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40918831) 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 in 7 ways as a sum of consecutive naturals, for example, 13411 + ... + 16176.

It is an arithmetic number, because the mean of its divisors is an integer number (6834828).

Almost surely, 2^40918821 is an apocalyptic number.

It is an amenable number.

40918821 is a deficient number, since it is larger than the sum of its proper divisors (13759803).

40918821 is a wasteful number, since it uses less digits than its factorization.

40918821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30051.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 40918821 is about 6396.7820816407. The cubic root of 40918821 is about 344.5939941378.

The spelling of 40918821 in words is "forty million, nine hundred eighteen thousand, eight hundred twenty-one".