40204420 has 12 divisors (see below), whose sum is σ = 84429324. Its totient is φ = 16081760.

The previous prime is 40204387. The next prime is 40204421. The reversal of 40204420 is 2440204.

It can be written as a sum of positive squares in 2 ways, for example, as 11303044 + 28901376 = 3362^2 + 5376^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40204394 and 40204403.

It is not an unprimeable number, because it can be changed into a prime (40204421) 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, 1005091 + ... + 1005130.

It is an arithmetic number, because the mean of its divisors is an integer number (7035777).

Almost surely, 2^40204420 is an apocalyptic number.

It is an amenable number.

40204420 is an abundant number, since it is smaller than the sum of its proper divisors (44224904).

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

40204420 is a wasteful number, since it uses less digits than its factorization.

40204420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010230 (or 2010228 counting only the distinct ones).

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

The square root of 40204420 is about 6340.6955454429. The cubic root of 40204420 is about 342.5767885085.

Adding to 40204420 its reverse (2440204), we get a palindrome (42644624).

The spelling of 40204420 in words is "forty million, two hundred four thousand, four hundred twenty".