210344420 has 48 divisors (see below), whose sum is σ = 518954688. Its totient is φ = 70604160.

The previous prime is 210344419. The next prime is 210344429. The reversal of 210344420 is 24443012.

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 = 210344392 and 210344401.

It is not an unprimeable number, because it can be changed into a prime (210344429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33914 + ... + 39633.

It is an arithmetic number, because the mean of its divisors is an integer number (10811556).

Almost surely, 2^210344420 is an apocalyptic number.

210344420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210344420 is an abundant number, since it is smaller than the sum of its proper divisors (308610268).

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

210344420 is a wasteful number, since it uses less digits than its factorization.

210344420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73580 (or 73578 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 210344420 is about 14503.2554966118. The cubic root of 210344420 is about 594.7169710562.

Adding to 210344420 its reverse (24443012), we get a palindrome (234787432).

The spelling of 210344420 in words is "two hundred ten million, three hundred forty-four thousand, four hundred twenty".