40003220 has 24 divisors (see below), whose sum is σ = 84206304. Its totient is φ = 15963296.

The previous prime is 40003219. The next prime is 40003241. The reversal of 40003220 is 2230004.

It is a super-2 number, since 2×40003220² = 3200515220736800, which contains 22 as substring.

It is a congruent number.

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, 7199 + ... + 11481.

It is an arithmetic number, because the mean of its divisors is an integer number (3508596).

Almost surely, 2^40003220 is an apocalyptic number.

It is an amenable number.

40003220 is an abundant number, since it is smaller than the sum of its proper divisors (44203084).

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

40003220 is a wasteful number, since it uses less digits than its factorization.

40003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759 (or 4757 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 40003220 is about 6324.8098785655. The cubic root of 40003220 is about 342.0043659600.

Adding to 40003220 its reverse (2230004), we get a palindrome (42233224).

The spelling of 40003220 in words is "forty million, three thousand, two hundred twenty".