40242220 has 24 divisors (see below), whose sum is σ = 84747600. Its totient is φ = 16051392.

The previous prime is 40242217. The next prime is 40242221. The reversal of 40242220 is 2224204.

It is a junction number, because it is equal to n+sod(n) for n = 40242194 and 40242203.

It is not an unprimeable number, because it can be changed into a prime (40242221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4926 + ... + 10234.

It is an arithmetic number, because the mean of its divisors is an integer number (3531150).

Almost surely, 2^40242220 is an apocalyptic number.

It is an amenable number.

40242220 is an abundant number, since it is smaller than the sum of its proper divisors (44505380).

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

40242220 is a wasteful number, since it uses less digits than its factorization.

40242220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697 (or 5695 counting only the distinct ones).

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

The square root of 40242220 is about 6343.6755906966. The cubic root of 40242220 is about 342.6841178884.

Adding to 40242220 its reverse (2224204), we get a palindrome (42466424).

The spelling of 40242220 in words is "forty million, two hundred forty-two thousand, two hundred twenty".