210440140 has 12 divisors (see below), whose sum is σ = 441924336. Its totient is φ = 84176048.

The previous prime is 210440137. The next prime is 210440147. The reversal of 210440140 is 41044012.

210440140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (210440147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5260984 + ... + 5261023.

It is an arithmetic number, because the mean of its divisors is an integer number (36827028).

Almost surely, 2^210440140 is an apocalyptic number.

210440140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210440140 is an abundant number, since it is smaller than the sum of its proper divisors (231484196).

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

210440140 is a wasteful number, since it uses less digits than its factorization.

210440140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522016 (or 10522014 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 210440140 is about 14506.5550700364. Note that the first 3 decimals coincide. The cubic root of 210440140 is about 594.8071686405.

Adding to 210440140 its reverse (41044012), we get a palindrome (251484152).

The spelling of 210440140 in words is "two hundred ten million, four hundred forty thousand, one hundred forty".