40004012 has 12 divisors (see below), whose sum is σ = 72265536. Its totient is φ = 19356720.

The previous prime is 40004011. The next prime is 40004017. The reversal of 40004012 is 21040004.

It is a super-2 number, since 2×40004012² = 3200641952192288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40003984 and 40004002.

It is not an unprimeable number, because it can be changed into a prime (40004011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161183 + ... + 161430.

It is an arithmetic number, because the mean of its divisors is an integer number (6022128).

Almost surely, 2^40004012 is an apocalyptic number.

It is an amenable number.

40004012 is a deficient number, since it is larger than the sum of its proper divisors (32261524).

40004012 is a wasteful number, since it uses less digits than its factorization.

40004012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322648 (or 322646 counting only the distinct ones).

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

The square root of 40004012 is about 6324.8724888333. The cubic root of 40004012 is about 342.0066229922.

Adding to 40004012 its reverse (21040004), we get a palindrome (61044016).

The spelling of 40004012 in words is "forty million, four thousand, twelve".