40444921 has 16 divisors (see below), whose sum is σ = 46934208. Its totient is φ = 34444800.

The previous prime is 40444903. The next prime is 40444931. The reversal of 40444921 is 12944404.

It is a cyclic number.

It is not a de Polignac number, because 40444921 - 2⁵ = 40444889 is a prime.

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 40444921.

It is not an unprimeable number, because it can be changed into a prime (40444931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58186 + ... + 58876.

It is an arithmetic number, because the mean of its divisors is an integer number (2933388).

Almost surely, 2^40444921 is an apocalyptic number.

It is an amenable number.

40444921 is a deficient number, since it is larger than the sum of its proper divisors (6489287).

40444921 is a wasteful number, since it uses less digits than its factorization.

40444921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 40444921 is about 6359.6321434498. The cubic root of 40444921 is about 343.2585238292.

The spelling of 40444921 in words is "forty million, four hundred forty-four thousand, nine hundred twenty-one".