40949821 has 16 divisors (see below), whose sum is σ = 49362048. Its totient is φ = 33510400.

The previous prime is 40949801. The next prime is 40949833. The reversal of 40949821 is 12894904.

It is a happy number.

40949821 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 40949821 - 2⁵ = 40949789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40949801) 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 15 ways as a sum of consecutive naturals, for example, 460 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (3085128).

Almost surely, 2^40949821 is an apocalyptic number.

It is an amenable number.

40949821 is a deficient number, since it is larger than the sum of its proper divisors (8412227).

40949821 is a wasteful number, since it uses less digits than its factorization.

40949821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9572.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 40949821 is about 6399.2047162128. The cubic root of 40949821 is about 344.6809933640.

The spelling of 40949821 in words is "forty million, nine hundred forty-nine thousand, eight hundred twenty-one".