40240242 has 48 divisors (see below), whose sum is σ = 101350080. Its totient is φ = 11300256.

The previous prime is 40240237. The next prime is 40240243. The reversal of 40240242 is 24204204.

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 (40240243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4728 + ... + 10140.

It is an arithmetic number, because the mean of its divisors is an integer number (2111460).

Almost surely, 2^40240242 is an apocalyptic number.

40240242 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 40240242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50675040).

40240242 is an abundant number, since it is smaller than the sum of its proper divisors (61109838).

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

40240242 is a wasteful number, since it uses less digits than its factorization.

40240242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487 (or 5484 counting only the distinct ones).

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

The square root of 40240242 is about 6343.5196854743. The cubic root of 40240242 is about 342.6785032189.

Adding to 40240242 its reverse (24204204), we get a palindrome (64444446).

The spelling of 40240242 in words is "forty million, two hundred forty thousand, two hundred forty-two".