40020242 has 8 divisors (see below), whose sum is σ = 60413196. Its totient is φ = 19882512.

The previous prime is 40020221. The next prime is 40020257. The reversal of 40020242 is 24202004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36954241 + 3066001 = 6079^2 + 1751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63413 + ... + 64040.

Almost surely, 2^40020242 is an apocalyptic number.

40020242 is a deficient number, since it is larger than the sum of its proper divisors (20392954).

40020242 is a wasteful number, since it uses less digits than its factorization.

40020242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127612.

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

The square root of 40020242 is about 6326.1553885437. The cubic root of 40020242 is about 342.0528684954.

Adding to 40020242 its reverse (24202004), we get a palindrome (64222246).

The spelling of 40020242 in words is "forty million, twenty thousand, two hundred forty-two".