420420234 has 64 divisors (see below), whose sum is σ = 966107520. Its totient is φ = 120821760.

The previous prime is 420420179. The next prime is 420420241. The reversal of 420420234 is 432024024.

It is a super-2 number, since 2×420420234² = 353506346313229512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420420234.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 183174 + ... + 185454.

It is an arithmetic number, because the mean of its divisors is an integer number (15095430).

Almost surely, 2^420420234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420420234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483053760).

420420234 is an abundant number, since it is smaller than the sum of its proper divisors (545687286).

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

420420234 is a wasteful number, since it uses less digits than its factorization.

420420234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 420420234 is about 20504.1516283898. The cubic root of 420420234 is about 749.1369236243.

Adding to 420420234 its reverse (432024024), we get a palindrome (852444258).

The spelling of 420420234 in words is "four hundred twenty million, four hundred twenty thousand, two hundred thirty-four".