40030565 has 8 divisors (see below), whose sum is σ = 48244248. Its totient is φ = 31886080.

The previous prime is 40030561. The next prime is 40030591. The reversal of 40030565 is 56503004.

40030565 = 293² + 294² + ... + 525².

It can be written as a sum of positive squares in 4 ways, for example, as 4401604 + 35628961 = 2098^2 + 5969^2 .

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

It is not a de Polignac number, because 40030565 - 2² = 40030561 is a prime.

It is a super-2 number, since 2×40030565² = 3204892268438450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40030565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40030561) 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, 16016 + ... + 18345.

It is an arithmetic number, because the mean of its divisors is an integer number (6030531).

Almost surely, 2^40030565 is an apocalyptic number.

It is an amenable number.

40030565 is a deficient number, since it is larger than the sum of its proper divisors (8213683).

40030565 is a wasteful number, since it uses less digits than its factorization.

40030565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34599.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 40030565 is about 6326.9712343269. The cubic root of 40030565 is about 342.0822761820.

Adding to 40030565 its reverse (56503004), we get a palindrome (96533569).

The spelling of 40030565 in words is "forty million, thirty thousand, five hundred sixty-five".