40975209 has 24 divisors (see below), whose sum is σ = 65018304. Its totient is φ = 24660000.

The previous prime is 40975189. The next prime is 40975217. The reversal of 40975209 is 90257904.

40975209 is a `hidden beast` number, since 40 + 97 + 520 + 9 = 666.

It is not a de Polignac number, because 40975209 - 2⁵ = 40975177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40974209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13579 + ... + 16319.

It is an arithmetic number, because the mean of its divisors is an integer number (2709096).

Almost surely, 2^40975209 is an apocalyptic number.

It is an amenable number.

40975209 is a deficient number, since it is larger than the sum of its proper divisors (24043095).

40975209 is a wasteful number, since it uses less digits than its factorization.

40975209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909 (or 2906 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 40975209 is about 6401.1880928465. The cubic root of 40975209 is about 344.7522102260.

The spelling of 40975209 in words is "forty million, nine hundred seventy-five thousand, two hundred nine".