210040042440 has 192 divisors, whose sum is σ = 652100716800. Its totient is φ = 54120821760.

The previous prime is 210040042393. The next prime is 210040042451. The reversal of 210040042440 is 44240040012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119816604 + ... + 119818356.

It is an arithmetic number, because the mean of its divisors is an integer number (3396357900).

Almost surely, 2^210040042440 is an apocalyptic number.

210040042440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210040042440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326050358400).

210040042440 is an abundant number, since it is smaller than the sum of its proper divisors (442060674360).

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

210040042440 is a wasteful number, since it uses less digits than its factorization.

210040042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2833 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 210040042440 its reverse (44240040012), we get a palindrome (254280082452).

The spelling of 210040042440 in words is "two hundred ten billion, forty million, forty-two thousand, four hundred forty".