420120234 has 24 divisors (see below), whose sum is σ = 931431072. Its totient is φ = 136783080.

The previous prime is 420120223. The next prime is 420120247. The reversal of 420120234 is 432021024.

420120234 is a `hidden beast` number, since 420 + 12 + 0 + 234 = 666.

It is a super-2 number, since 2×420120234² = 353002022032429512, which contains 22 as substring.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270622 + ... + 272169.

It is an arithmetic number, because the mean of its divisors is an integer number (38809628).

Almost surely, 2^420120234 is an apocalyptic number.

420120234 is an abundant number, since it is smaller than the sum of its proper divisors (511310838).

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

420120234 is a wasteful number, since it uses less digits than its factorization.

420120234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542842 (or 542839 counting only the distinct ones).

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

The square root of 420120234 is about 20496.8347312457. The cubic root of 420120234 is about 748.9586935770.

Adding to 420120234 its reverse (432021024), we get a palindrome (852141258).

The spelling of 420120234 in words is "four hundred twenty million, one hundred twenty thousand, two hundred thirty-four".