40645573 has 8 divisors (see below), whose sum is σ = 42015992. Its totient is φ = 39289536.

The previous prime is 40645567. The next prime is 40645609. The reversal of 40645573 is 37554604.

It is a happy number.

40645573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6796449 + 33849124 = 2607^2 + 5818^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40645573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40645543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2311 + ... + 9307.

It is an arithmetic number, because the mean of its divisors is an integer number (5251999).

Almost surely, 2^40645573 is an apocalyptic number.

It is an amenable number.

40645573 is a deficient number, since it is larger than the sum of its proper divisors (1370419).

40645573 is a wasteful number, since it uses less digits than its factorization.

40645573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7191.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 40645573 is about 6375.3880666199. The cubic root of 40645573 is about 343.8252362922.

The spelling of 40645573 in words is "forty million, six hundred forty-five thousand, five hundred seventy-three".