40004512 has 12 divisors (see below), whose sum is σ = 78758946. Its totient is φ = 20002240.

The previous prime is 40004509. The next prime is 40004513. The reversal of 40004512 is 21540004.

It can be written as a sum of positive squares in only one way, i.e., 33223696 + 6780816 = 5764^2 + 2604^2 .

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40004513) 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, 625039 + ... + 625102.

Almost surely, 2^40004512 is an apocalyptic number.

It is an amenable number.

40004512 is a deficient number, since it is larger than the sum of its proper divisors (38754434).

40004512 is a wasteful number, since it uses less digits than its factorization.

40004512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250151 (or 1250143 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 40004512 is about 6324.9120151983. The cubic root of 40004512 is about 342.0080478710.

Adding to 40004512 its reverse (21540004), we get a palindrome (61544516).

The spelling of 40004512 in words is "forty million, four thousand, five hundred twelve".