40491444 has 36 divisors (see below), whose sum is σ = 109906944. Its totient is φ = 11568816.

The previous prime is 40491443. The next prime is 40491457. The reversal of 40491444 is 44419404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40491443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33844 + ... + 35019.

Almost surely, 2^40491444 is an apocalyptic number.

It is an amenable number.

40491444 is an abundant number, since it is smaller than the sum of its proper divisors (69415500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40491444 is a wasteful number, since it uses less digits than its factorization.

40491444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68884 (or 68875 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 40491444 is about 6363.2887723252. The cubic root of 40491444 is about 343.3900879145.

The spelling of 40491444 in words is "forty million, four hundred ninety-one thousand, four hundred forty-four".