40400012 has 12 divisors (see below), whose sum is σ = 70943376. Its totient is φ = 20130480.

The previous prime is 40400011. The next prime is 40400021. The reversal of 40400012 is 21000404.

It is a super-3 number, since 3×40400012³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40399966 and 40400002.

It is not an unprimeable number, because it can be changed into a prime (40400011) 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 in 3 ways as a sum of consecutive naturals, for example, 16064 + ... + 18407.

It is an arithmetic number, because the mean of its divisors is an integer number (5911948).

Almost surely, 2^40400012 is an apocalyptic number.

It is an amenable number.

40400012 is a deficient number, since it is larger than the sum of its proper divisors (30543364).

40400012 is a wasteful number, since it uses less digits than its factorization.

40400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34768 (or 34766 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40400012 is about 6356.1003768034. The cubic root of 40400012 is about 343.1314282977.

Adding to 40400012 its reverse (21000404), we get a palindrome (61400416).

The spelling of 40400012 in words is "forty million, four hundred thousand, twelve".