40440220 has 12 divisors (see below), whose sum is σ = 84924504. Its totient is φ = 16176080.

The previous prime is 40440203. The next prime is 40440221. The reversal of 40440220 is 2204404.

It is a super-2 number, since 2×40440220² = 3270822787296800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40440194 and 40440203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1010986 + ... + 1011025.

It is an arithmetic number, because the mean of its divisors is an integer number (7077042).

Almost surely, 2^40440220 is an apocalyptic number.

It is an amenable number.

40440220 is an abundant number, since it is smaller than the sum of its proper divisors (44484284).

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

40440220 is a wasteful number, since it uses less digits than its factorization.

40440220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022020 (or 2022018 counting only the distinct ones).

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

The square root of 40440220 is about 6359.2625358606. The cubic root of 40440220 is about 343.2452240889.

Adding to 40440220 its reverse (2204404), we get a palindrome (42644624).

The spelling of 40440220 in words is "forty million, four hundred forty thousand, two hundred twenty".