40008564 has 36 divisors (see below), whose sum is σ = 101504676. Its totient is φ = 13287168.

The previous prime is 40008557. The next prime is 40008589. The reversal of 40008564 is 46580004.

It can be written as a sum of positive squares in 2 ways, for example, as 24088464 + 15920100 = 4908^2 + 3990^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8652 + ... + 12444.

Almost surely, 2^40008564 is an apocalyptic number.

It is an amenable number.

40008564 is an abundant number, since it is smaller than the sum of its proper divisors (61496112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40008564 is a wasteful number, since it uses less digits than its factorization.

40008564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096 (or 4091 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 40008564 is about 6325.2323277489. The cubic root of 40008564 is about 342.0195946504.

Adding to 40008564 its reverse (46580004), we get a palindrome (86588568).

The spelling of 40008564 in words is "forty million, eight thousand, five hundred sixty-four".