40204242 has 32 divisors (see below), whose sum is σ = 96216960. Its totient is φ = 12370320.

The previous prime is 40204189. The next prime is 40204243. The reversal of 40204242 is 24240204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (40204243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27934 + ... + 29337.

It is an arithmetic number, because the mean of its divisors is an integer number (3006780).

Almost surely, 2^40204242 is an apocalyptic number.

40204242 is an abundant number, since it is smaller than the sum of its proper divisors (56012718).

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

40204242 is a wasteful number, since it uses less digits than its factorization.

40204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57295 (or 57289 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 40204242 is about 6340.6815091124. The cubic root of 40204242 is about 342.5762829359.

Adding to 40204242 its reverse (24240204), we get a palindrome (64444446).

The spelling of 40204242 in words is "forty million, two hundred four thousand, two hundred forty-two".