240400040040 has 48 divisors (see below), whose sum is σ = 781300131300. Its totient is φ = 64106677248.

The previous prime is 240400040029. The next prime is 240400040057. The reversal of 240400040040 is 40040004042.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 240337218564 + 62821476 = 490242^2 + 7926^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 240400039995 and 240400040022.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333888585 + ... + 333889304.

Almost surely, 2^240400040040 is an apocalyptic number.

240400040040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240400040040 is an abundant number, since it is smaller than the sum of its proper divisors (540900091260).

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

240400040040 is a wasteful number, since it uses less digits than its factorization.

240400040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667777906 (or 667777899 counting only the distinct ones).

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

Adding to 240400040040 its reverse (40040004042), we get a palindrome (280440044082).

The spelling of 240400040040 in words is "two hundred forty billion, four hundred million, forty thousand, forty".