40664208 has 40 divisors (see below), whose sum is σ = 113131648. Its totient is φ = 12511872.

The previous prime is 40664179. The next prime is 40664209. The reversal of 40664208 is 80246604.

It is not an unprimeable number, because it can be changed into a prime (40664209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31960 + ... + 33207.

Almost surely, 2^40664208 is an apocalyptic number.

40664208 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40664208 is an abundant number, since it is smaller than the sum of its proper divisors (72467440).

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

40664208 is a wasteful number, since it uses less digits than its factorization.

40664208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65191 (or 65185 counting only the distinct ones).

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

The square root of 40664208 is about 6376.8493788077. The cubic root of 40664208 is about 343.8777734148.

The spelling of 40664208 in words is "forty million, six hundred sixty-four thousand, two hundred eight".