40044220 has 12 divisors (see below), whose sum is σ = 84092904. Its totient is φ = 16017680.

The previous prime is 40044209. The next prime is 40044227. The reversal of 40044220 is 2244004.

It is a junction number, because it is equal to n+sod(n) for n = 40044194 and 40044203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40044227) 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, 1001086 + ... + 1001125.

It is an arithmetic number, because the mean of its divisors is an integer number (7007742).

Almost surely, 2^40044220 is an apocalyptic number.

It is an amenable number.

40044220 is an abundant number, since it is smaller than the sum of its proper divisors (44048684).

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

40044220 is a wasteful number, since it uses less digits than its factorization.

40044220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002220 (or 2002218 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40044220 is about 6328.0502526450. The cubic root of 40044220 is about 342.1211681508.

Adding to 40044220 its reverse (2244004), we get a palindrome (42288224).

The spelling of 40044220 in words is "forty million, forty-four thousand, two hundred twenty".