40042012 has 24 divisors (see below), whose sum is σ = 71457120. Its totient is φ = 19629120.

The previous prime is 40042007. The next prime is 40042027. The reversal of 40042012 is 21024004.

It is a junction number, because it is equal to n+sod(n) for n = 40041983 and 40042001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78414 + ... + 78922.

It is an arithmetic number, because the mean of its divisors is an integer number (2977380).

Almost surely, 2^40042012 is an apocalyptic number.

It is an amenable number.

40042012 is a deficient number, since it is larger than the sum of its proper divisors (31415108).

40042012 is a wasteful number, since it uses less digits than its factorization.

40042012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

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

The square root of 40042012 is about 6327.8757889200. The cubic root of 40042012 is about 342.1148799572.

Adding to 40042012 its reverse (21024004), we get a palindrome (61066016).

The spelling of 40042012 in words is "forty million, forty-two thousand, twelve".