40020220 has 24 divisors (see below), whose sum is σ = 84171024. Its totient is φ = 15983616.

The previous prime is 40020191. The next prime is 40020221. The reversal of 40020220 is 2202004.

It is a happy number.

40020220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 40020197 and 40020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17884 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (3507126).

Almost surely, 2^40020220 is an apocalyptic number.

It is an amenable number.

40020220 is an abundant number, since it is smaller than the sum of its proper divisors (44150804).

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

40020220 is a wasteful number, since it uses less digits than its factorization.

40020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069 (or 3067 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 40020220 is about 6326.1536497306. The cubic root of 40020220 is about 342.0528058175.

Adding to 40020220 its reverse (2202004), we get a palindrome (42222224).

The spelling of 40020220 in words is "forty million, twenty thousand, two hundred twenty".