40042212 has 36 divisors (see below), whose sum is σ = 108687600. Its totient is φ = 11440464.

The previous prime is 40042187. The next prime is 40042213. The reversal of 40042212 is 21224004.

It is a junction number, because it is equal to n+sod(n) for n = 40042191 and 40042200.

It is not an unprimeable number, because it can be changed into a prime (40042213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33462 + ... + 34637.

It is an arithmetic number, because the mean of its divisors is an integer number (3019100).

Almost surely, 2^40042212 is an apocalyptic number.

40042212 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

40042212 is an abundant number, since it is smaller than the sum of its proper divisors (68645388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40042212 is a wasteful number, since it uses less digits than its factorization.

40042212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68120 (or 68111 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40042212 is about 6327.8915919918. The cubic root of 40042212 is about 342.1154495495.

Adding to 40042212 its reverse (21224004), we get a palindrome (61266216).

It can be divided in two parts, 4004 and 2212, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 40042212 in words is "forty million, forty-two thousand, two hundred twelve".