40007645 has 8 divisors (see below), whose sum is σ = 48051456. Its totient is φ = 31977936.

The previous prime is 40007641. The next prime is 40007651. The reversal of 40007645 is 54670004.

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 40007645 - 2² = 40007641 is a prime.

It is a super-2 number, since 2×40007645² = 3201223316892050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40007641) 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, 4304 + ... + 9926.

It is an arithmetic number, because the mean of its divisors is an integer number (6006432).

Almost surely, 2^40007645 is an apocalyptic number.

It is an amenable number.

40007645 is a deficient number, since it is larger than the sum of its proper divisors (8043811).

40007645 is a wasteful number, since it uses less digits than its factorization.

40007645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 40007645 is about 6325.1596817788. The cubic root of 40007645 is about 342.0169758909.

Adding to 40007645 its reverse (54670004), we get a palindrome (94677649).

The spelling of 40007645 in words is "forty million, seven thousand, six hundred forty-five".