40655172 has 12 divisors (see below), whose sum is σ = 94862096. Its totient is φ = 13551720.

The previous prime is 40655123. The next prime is 40655179. The reversal of 40655172 is 27155604.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (40655179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693954 + ... + 1693977.

Almost surely, 2^40655172 is an apocalyptic number.

It is an amenable number.

40655172 is an abundant number, since it is smaller than the sum of its proper divisors (54206924).

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

40655172 is a wasteful number, since it uses less digits than its factorization.

40655172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387938 (or 3387936 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 40655172 is about 6376.1408390970. The cubic root of 40655172 is about 343.8523004833.

The spelling of 40655172 in words is "forty million, six hundred fifty-five thousand, one hundred seventy-two".