40220420404242 has 64 divisors (see below), whose sum is σ = 86982874828416. Its totient is φ = 12324913344000.

The previous prime is 40220420404159. The next prime is 40220420404247. The reversal of 40220420404242 is 24240402402204.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40220420404247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195148398 + ... + 195354390.

It is an arithmetic number, because the mean of its divisors is an integer number (1359107419194).

Almost surely, 2^{40220420404242} is an apocalyptic number.

40220420404242 is an abundant number, since it is smaller than the sum of its proper divisors (46762454424174).

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

40220420404242 is a wasteful number, since it uses less digits than its factorization.

40220420404242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216235.

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 40220420404242 its reverse (24240402402204), we get a palindrome (64460822806446).

The spelling of 40220420404242 in words is "forty trillion, two hundred twenty billion, four hundred twenty million, four hundred four thousand, two hundred forty-two".