40002220 has 24 divisors (see below), whose sum is σ = 88426800. Its totient is φ = 15158592.

The previous prime is 40002199. The next prime is 40002233. The reversal of 40002220 is 2220004.

It is a happy number.

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

40002220 is a modest number, since divided by 2220 gives 40 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 40002197 and 40002206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52255 + ... + 53014.

It is an arithmetic number, because the mean of its divisors is an integer number (3684450).

Almost surely, 2^40002220 is an apocalyptic number.

It is an amenable number.

40002220 is an abundant number, since it is smaller than the sum of its proper divisors (48424580).

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

40002220 is a wasteful number, since it uses less digits than its factorization.

40002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105297 (or 105295 counting only the distinct ones).

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

The square root of 40002220 is about 6324.7308243118. The cubic root of 40002220 is about 342.0015161293.

Adding to 40002220 its reverse (2220004), we get a palindrome (42222224).

The spelling of 40002220 in words is "forty million, two thousand, two hundred twenty".