234421728 has 48 divisors (see below), whose sum is σ = 622293840. Its totient is φ = 77259776.

The previous prime is 234421711. The next prime is 234421763. The reversal of 234421728 is 827124432.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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, 5175 + ... + 22262.

It is an arithmetic number, because the mean of its divisors is an integer number (12964455).

Almost surely, 2^234421728 is an apocalyptic number.

It is an amenable number.

234421728 is an abundant number, since it is smaller than the sum of its proper divisors (387872112).

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

234421728 is a wasteful number, since it uses less digits than its factorization.

234421728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27539 (or 27531 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 234421728 is about 15310.8369464246. The cubic root of 234421728 is about 616.5939904937.

The spelling of 234421728 in words is "two hundred thirty-four million, four hundred twenty-one thousand, seven hundred twenty-eight".