40991841 has 24 divisors (see below), whose sum is σ = 66175200. Its totient is φ = 24235200.

The previous prime is 40991809. The next prime is 40991861. The reversal of 40991841 is 14819904.

40991841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40991841 - 2⁵ = 40991809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40991796 and 40991805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40991801) 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 23 ways as a sum of consecutive naturals, for example, 991 + ... + 9108.

It is an arithmetic number, because the mean of its divisors is an integer number (2757300).

Almost surely, 2^40991841 is an apocalyptic number.

40991841 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40991841 is a deficient number, since it is larger than the sum of its proper divisors (25183359).

40991841 is a wasteful number, since it uses less digits than its factorization.

40991841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10157 (or 10154 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 40991841 is about 6402.4870948718. The cubic root of 40991841 is about 344.7988493465.

The spelling of 40991841 in words is "forty million, nine hundred ninety-one thousand, eight hundred forty-one".