40809573 has 12 divisors (see below), whose sum is σ = 67368288. Its totient is φ = 23319720.

The previous prime is 40809569. The next prime is 40809581. The reversal of 40809573 is 37590804.

40809573 is a `hidden beast` number, since 4 + 0 + 80 + 9 + 573 = 666.

It is not a de Polignac number, because 40809573 - 2² = 40809569 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40809553) 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, 323823 + ... + 323948.

It is an arithmetic number, because the mean of its divisors is an integer number (5614024).

Almost surely, 2^40809573 is an apocalyptic number.

It is an amenable number.

40809573 is a deficient number, since it is larger than the sum of its proper divisors (26558715).

40809573 is a wasteful number, since it uses less digits than its factorization.

40809573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647784 (or 647781 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 40809573 is about 6388.2370807602. The cubic root of 40809573 is about 344.2870468940.

The spelling of 40809573 in words is "forty million, eight hundred nine thousand, five hundred seventy-three".