242440040 has 16 divisors (see below), whose sum is σ = 545490180. Its totient is φ = 96976000.

The previous prime is 242440039. The next prime is 242440069. The reversal of 242440040 is 40044242.

It can be written as a sum of positive squares in 2 ways, for example, as 242175844 + 264196 = 15562^2 + 514^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 242439994 and 242440021.

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, 3030461 + ... + 3030540.

Almost surely, 2^242440040 is an apocalyptic number.

242440040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242440040 is an abundant number, since it is smaller than the sum of its proper divisors (303050140).

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

242440040 is a wasteful number, since it uses less digits than its factorization.

242440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061012 (or 6061008 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 242440040 is about 15570.4861838030. The cubic root of 242440040 is about 623.5454516218.

Adding to 242440040 its reverse (40044242), we get a palindrome (282484282).

The spelling of 242440040 in words is "two hundred forty-two million, four hundred forty thousand, forty".