40441509 has 6 divisors (see below), whose sum is σ = 58415526. Its totient is φ = 26961000.

The previous prime is 40441477. The next prime is 40441517. The reversal of 40441509 is 90514404.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 12404484 = 5295^2 + 3522^2 .

It is not a de Polignac number, because 40441509 - 2⁵ = 40441477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40441559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2246742 + ... + 2246759.

It is an arithmetic number, because the mean of its divisors is an integer number (9735921).

Almost surely, 2^40441509 is an apocalyptic number.

It is an amenable number.

40441509 is a deficient number, since it is larger than the sum of its proper divisors (17974017).

40441509 is a wasteful number, since it uses less digits than its factorization.

40441509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4493507 (or 4493504 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40441509 is about 6359.3638832827. The cubic root of 40441509 is about 343.2488709400.

The spelling of 40441509 in words is "forty million, four hundred forty-one thousand, five hundred nine".