40623645 has 8 divisors (see below), whose sum is σ = 64997856. Its totient is φ = 21665936.

The previous prime is 40623643. The next prime is 40623673. The reversal of 40623645 is 54632604.

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 40623645 - 2¹ = 40623643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40623643) 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, 1354107 + ... + 1354136.

It is an arithmetic number, because the mean of its divisors is an integer number (8124732).

Almost surely, 2^40623645 is an apocalyptic number.

It is an amenable number.

40623645 is a deficient number, since it is larger than the sum of its proper divisors (24374211).

40623645 is a wasteful number, since it uses less digits than its factorization.

40623645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708251.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 40623645 is about 6373.6680961594. The cubic root of 40623645 is about 343.7633947398.

The spelling of 40623645 in words is "forty million, six hundred twenty-three thousand, six hundred forty-five".