40573645 has 64 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 23887872.

The previous prime is 40573609. The next prime is 40573691. The reversal of 40573645 is 54637504.

It is a happy number.

It is a 8-Lehmer number, since φ(40573645) divides (40573645-1)⁸.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40573645 is a prime.

It is a super-3 number, since 3×40573645³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40573645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 418237 + ... + 418333.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^40573645 is an apocalyptic number.

It is an amenable number.

40573645 is a deficient number, since it is larger than the sum of its proper divisors (23777075).

40573645 is a wasteful number, since it uses less digits than its factorization.

40573645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182.

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

The square root of 40573645 is about 6369.7445003705. The cubic root of 40573645 is about 343.6223009970.

The spelling of 40573645 in words is "forty million, five hundred seventy-three thousand, six hundred forty-five".