40204220 has 24 divisors (see below), whose sum is σ = 96490464. Its totient is φ = 13784256.

The previous prime is 40204189. The next prime is 40204243. The reversal of 40204220 is 2240204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 40204195 and 40204204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143447 + ... + 143726.

It is an arithmetic number, because the mean of its divisors is an integer number (4020436).

Almost surely, 2^40204220 is an apocalyptic number.

It is an amenable number.

40204220 is an abundant number, since it is smaller than the sum of its proper divisors (56286244).

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

40204220 is a wasteful number, since it uses less digits than its factorization.

40204220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287189 (or 287187 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40204220 is about 6340.6797742829. The cubic root of 40204220 is about 342.5762204493.

Adding to 40204220 its reverse (2240204), we get a palindrome (42444424).

The spelling of 40204220 in words is "forty million, two hundred four thousand, two hundred twenty".