234421428 has 24 divisors (see below), whose sum is σ = 570765888. Its totient is φ = 74742976.

The previous prime is 234421417. The next prime is 234421433. The reversal of 234421428 is 824124432.

It is a junction number, because it is equal to n+sod(n) for n = 234421395 and 234421404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424401 + ... + 424952.

It is an arithmetic number, because the mean of its divisors is an integer number (23781912).

Almost surely, 2^234421428 is an apocalyptic number.

It is an amenable number.

234421428 is an abundant number, since it is smaller than the sum of its proper divisors (336344460).

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

234421428 is a wasteful number, since it uses less digits than its factorization.

234421428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849383 (or 849381 counting only the distinct ones).

The product of its digits is 12288, while the sum is 30.

The square root of 234421428 is about 15310.8271494391. The cubic root of 234421428 is about 616.5937274660.

The spelling of 234421428 in words is "two hundred thirty-four million, four hundred twenty-one thousand, four hundred twenty-eight".