40609220 has 12 divisors (see below), whose sum is σ = 85279404. Its totient is φ = 16243680.

The previous prime is 40609211. The next prime is 40609241. The reversal of 40609220 is 2290604.

40609220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 29333056 + 11276164 = 5416^2 + 3358^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1015211 + ... + 1015250.

It is an arithmetic number, because the mean of its divisors is an integer number (7106617).

Almost surely, 2^40609220 is an apocalyptic number.

It is an amenable number.

40609220 is an abundant number, since it is smaller than the sum of its proper divisors (44670184).

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

40609220 is a wasteful number, since it uses less digits than its factorization.

40609220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030470 (or 2030468 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40609220 is about 6372.5363867145. The cubic root of 40609220 is about 343.7227010828.

Adding to 40609220 its reverse (2290604), we get a palindrome (42899824).

The spelling of 40609220 in words is "forty million, six hundred nine thousand, two hundred twenty".