40020222 has 32 divisors (see below), whose sum is σ = 88133760. Its totient is φ = 12013920.

The previous prime is 40020221. The next prime is 40020257. The reversal of 40020222 is 22202004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40020198 and 40020207.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4413 + ... + 9975.

It is an arithmetic number, because the mean of its divisors is an integer number (2754180).

Almost surely, 2^40020222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40020222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44066880).

40020222 is an abundant number, since it is smaller than the sum of its proper divisors (48113538).

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

40020222 is a wasteful number, since it uses less digits than its factorization.

40020222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 40020222 is about 6326.1538078045. The cubic root of 40020222 is about 342.0528115155.

Adding to 40020222 its reverse (22202004), we get a palindrome (62222226).

The spelling of 40020222 in words is "forty million, twenty thousand, two hundred twenty-two".