40205645 has 8 divisors (see below), whose sum is σ = 49369056. Its totient is φ = 31416336.

The previous prime is 40205621. The next prime is 40205651. The reversal of 40205645 is 54650204.

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 40205645 - 2¹⁶ = 40140109 is a prime.

It is a super-3 number, since 3×40205645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian 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, 93287 + ... + 93716.

It is an arithmetic number, because the mean of its divisors is an integer number (6171132).

Almost surely, 2^40205645 is an apocalyptic number.

It is an amenable number.

40205645 is a deficient number, since it is larger than the sum of its proper divisors (9163411).

40205645 is a wasteful number, since it uses less digits than its factorization.

40205645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187051.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 40205645 is about 6340.7921429424. The cubic root of 40205645 is about 342.5802678299.

Adding to 40205645 its reverse (54650204), we get a palindrome (94855849).

The spelling of 40205645 in words is "forty million, two hundred five thousand, six hundred forty-five".