40640804 has 12 divisors (see below), whose sum is σ = 71172444. Its totient is φ = 20305824.

The previous prime is 40640801. The next prime is 40640819. The reversal of 40640804 is 40804604.

It can be written as a sum of positive squares in 2 ways, for example, as 16826404 + 23814400 = 4102^2 + 4880^2 .

It is not an unprimeable number, because it can be changed into a prime (40640801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4802 + ... + 10214.

It is an arithmetic number, because the mean of its divisors is an integer number (5931037).

Almost surely, 2^40640804 is an apocalyptic number.

It is an amenable number.

40640804 is a deficient number, since it is larger than the sum of its proper divisors (30531640).

40640804 is a wasteful number, since it uses less digits than its factorization.

40640804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7294 (or 7292 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 40640804 is about 6375.0140392002. The cubic root of 40640804 is about 343.8117886064.

The spelling of 40640804 in words is "forty million, six hundred forty thousand, eight hundred four".