40007565 has 24 divisors (see below), whose sum is σ = 74681880. Its totient is φ = 19695744.

The previous prime is 40007551. The next prime is 40007567. The reversal of 40007565 is 56570004.

It can be written as a sum of positive squares in 4 ways, for example, as 3392964 + 36614601 = 1842^2 + 6051^2 .

It is not a de Polignac number, because 40007565 - 2⁵ = 40007533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40007567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33610 + ... + 34779.

It is an arithmetic number, because the mean of its divisors is an integer number (3111745).

Almost surely, 2^40007565 is an apocalyptic number.

40007565 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40007565 is a deficient number, since it is larger than the sum of its proper divisors (34674315).

40007565 is a wasteful number, since it uses less digits than its factorization.

40007565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68413 (or 68410 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 40007565 is about 6325.1533578246. The cubic root of 40007565 is about 342.0167479230.

Adding to 40007565 its reverse (56570004), we get a palindrome (96577569).

The spelling of 40007565 in words is "forty million, seven thousand, five hundred sixty-five".