40004036 has 6 divisors (see below), whose sum is σ = 70007070. Its totient is φ = 20002016.

The previous prime is 40004023. The next prime is 40004039. The reversal of 40004036 is 63040004.

It can be written as a sum of positive squares in only one way, i.e., 38365636 + 1638400 = 6194^2 + 1280^2 .

It is not an unprimeable number, because it can be changed into a prime (40004039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000501 + ... + 5000508.

It is an arithmetic number, because the mean of its divisors is an integer number (11667845).

Almost surely, 2^40004036 is an apocalyptic number.

It is an amenable number.

40004036 is a deficient number, since it is larger than the sum of its proper divisors (30003034).

40004036 is a wasteful number, since it uses less digits than its factorization.

40004036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001013 (or 10001011 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40004036 is about 6324.8743861044. The cubic root of 40004036 is about 342.0066913867.

The spelling of 40004036 in words is "forty million, four thousand, thirty-six", and thus it is an eban number.