210340420 has 24 divisors (see below), whose sum is σ = 446007744. Its totient is φ = 83318496.

The previous prime is 210340409. The next prime is 210340421. The reversal of 210340420 is 24043012.

It is a junction number, because it is equal to n+sod(n) for n = 210340394 and 210340403.

It is not an unprimeable number, because it can be changed into a prime (210340421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48994 + ... + 53113.

It is an arithmetic number, because the mean of its divisors is an integer number (18583656).

Almost surely, 2^210340420 is an apocalyptic number.

210340420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210340420 is an abundant number, since it is smaller than the sum of its proper divisors (235667324).

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

210340420 is a wasteful number, since it uses less digits than its factorization.

210340420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102219 (or 102217 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 210340420 is about 14503.1175958826. The cubic root of 210340420 is about 594.7132012344.

Adding to 210340420 its reverse (24043012), we get a palindrome (234383432).

The spelling of 210340420 in words is "two hundred ten million, three hundred forty thousand, four hundred twenty".