40420012 has 12 divisors (see below), whose sum is σ = 71159760. Its totient is φ = 20088656.

The previous prime is 40420007. The next prime is 40420013. The reversal of 40420012 is 21002404.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 40419974 and 40420001.

It is not an unprimeable number, because it can be changed into a prime (40420013) 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, 29587 + ... + 30922.

It is an arithmetic number, because the mean of its divisors is an integer number (5929980).

Almost surely, 2^40420012 is an apocalyptic number.

It is an amenable number.

40420012 is a deficient number, since it is larger than the sum of its proper divisors (30739748).

40420012 is a wasteful number, since it uses less digits than its factorization.

40420012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60680 (or 60678 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40420012 is about 6357.6734738425. The cubic root of 40420012 is about 343.1880412878.

Adding to 40420012 its reverse (21002404), we get a palindrome (61422416).

The spelling of 40420012 in words is "forty million, four hundred twenty thousand, twelve".