40940645 has 8 divisors (see below), whose sum is σ = 50056056. Its totient is φ = 32134336.

The previous prime is 40940639. The next prime is 40940651. The reversal of 40940645 is 54604904.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40940639) and next prime (40940651).

It can be written as a sum of positive squares in 4 ways, for example, as 401956 + 40538689 = 634^2 + 6367^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40940645 - 2¹² = 40936549 is a prime.

It is a super-2 number, since 2×40940645² = 3352272826032050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76982 + ... + 77511.

It is an arithmetic number, because the mean of its divisors is an integer number (6257007).

Almost surely, 2^40940645 is an apocalyptic number.

It is an amenable number.

40940645 is a deficient number, since it is larger than the sum of its proper divisors (9115411).

40940645 is a wasteful number, since it uses less digits than its factorization.

40940645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154551.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 40940645 is about 6398.4877119519. The cubic root of 40940645 is about 344.6552461691.

The spelling of 40940645 in words is "forty million, nine hundred forty thousand, six hundred forty-five".