40449165 has 32 divisors (see below), whose sum is σ = 67132800. Its totient is φ = 20782080.

The previous prime is 40449163. The next prime is 40449169. The reversal of 40449165 is 56194404.

It is not a de Polignac number, because 40449165 - 2¹ = 40449163 is a prime.

It is a super-2 number, since 2×40449165² = 3272269898394450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40449163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54366 + ... + 55104.

It is an arithmetic number, because the mean of its divisors is an integer number (2097900).

Almost surely, 2^40449165 is an apocalyptic number.

It is an amenable number.

40449165 is a deficient number, since it is larger than the sum of its proper divisors (26683635).

40449165 is a wasteful number, since it uses less digits than its factorization.

40449165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 40449165 is about 6359.9658017948. The cubic root of 40449165 is about 343.2705297720.

The spelling of 40449165 in words is "forty million, four hundred forty-nine thousand, one hundred sixty-five".