420210234 has 64 divisors (see below), whose sum is σ = 955514880. Its totient is φ = 136851120.

The previous prime is 420210223. The next prime is 420210257. The reversal of 420210234 is 432012024.

420210234 is a `hidden beast` number, since 420 + 2 + 10 + 234 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 486487 + ... + 487349.

It is an arithmetic number, because the mean of its divisors is an integer number (14929920).

Almost surely, 2^420210234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420210234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477757440).

420210234 is an abundant number, since it is smaller than the sum of its proper divisors (535304646).

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

420210234 is a wasteful number, since it uses less digits than its factorization.

420210234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420210234 is about 20499.0300746157. The cubic root of 420210234 is about 749.0121714977.

Adding to 420210234 its reverse (432012024), we get a palindrome (852222258).

The spelling of 420210234 in words is "four hundred twenty million, two hundred ten thousand, two hundred thirty-four".