28234481 has 4 divisors (see below), whose sum is σ = 30801264. Its totient is φ = 25667700.

The previous prime is 28234477. The next prime is 28234489. The reversal of 28234481 is 18443282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28234481 - 2² = 28234477 is a prime.

It is a super-2 number, since 2×28234481² = 1594371834678722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28234489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283375 + ... + 1283396.

It is an arithmetic number, because the mean of its divisors is an integer number (7700316).

Almost surely, 2^28234481 is an apocalyptic number.

It is an amenable number.

28234481 is a deficient number, since it is larger than the sum of its proper divisors (2566783).

28234481 is a wasteful number, since it uses less digits than its factorization.

28234481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566782.

The product of its digits is 12288, while the sum is 32.

The square root of 28234481 is about 5313.6128010987. The cubic root of 28234481 is about 304.5041877187.

The spelling of 28234481 in words is "twenty-eight million, two hundred thirty-four thousand, four hundred eighty-one".