40404212 has 12 divisors (see below), whose sum is σ = 70878276. Its totient is φ = 20153280.

The previous prime is 40404209. The next prime is 40404233. The reversal of 40404212 is 21240404.

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 40271716 = 364^2 + 6346^2 .

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10313 + ... + 13680.

It is an arithmetic number, because the mean of its divisors is an integer number (5906523).

Almost surely, 2^40404212 is an apocalyptic number.

It is an amenable number.

40404212 is a deficient number, since it is larger than the sum of its proper divisors (30474064).

40404212 is a wasteful number, since it uses less digits than its factorization.

40404212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24418 (or 24416 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40404212 is about 6356.4307594750. The cubic root of 40404212 is about 343.1433185752.

Adding to 40404212 its reverse (21240404), we get a palindrome (61644616).

The spelling of 40404212 in words is "forty million, four hundred four thousand, two hundred twelve".