40008212 has 6 divisors (see below), whose sum is σ = 70014378. Its totient is φ = 20004104.

The previous prime is 40008203. The next prime is 40008217. The reversal of 40008212 is 21280004.

It can be written as a sum of positive squares in only one way, i.e., 35952016 + 4056196 = 5996^2 + 2014^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40008217) 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, 5001023 + ... + 5001030.

It is an arithmetic number, because the mean of its divisors is an integer number (11669063).

Almost surely, 2^40008212 is an apocalyptic number.

It is an amenable number.

40008212 is a deficient number, since it is larger than the sum of its proper divisors (30006166).

40008212 is a wasteful number, since it uses less digits than its factorization.

40008212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002057 (or 10002055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 40008212 is about 6325.2045026228. The cubic root of 40008212 is about 342.0185916047.

Adding to 40008212 its reverse (21280004), we get a palindrome (61288216).

The spelling of 40008212 in words is "forty million, eight thousand, two hundred twelve".