28704430 has 8 divisors (see below), whose sum is σ = 51667992. Its totient is φ = 11481768.

The previous prime is 28704427. The next prime is 28704439. The reversal of 28704430 is 3440782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704439) 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, 1435212 + ... + 1435231.

It is an arithmetic number, because the mean of its divisors is an integer number (6458499).

Almost surely, 2^28704430 is an apocalyptic number.

28704430 is a deficient number, since it is larger than the sum of its proper divisors (22963562).

28704430 is a wasteful number, since it uses less digits than its factorization.

28704430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870450.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 28704430 is about 5357.6515377542. The cubic root of 28704430 is about 306.1843407760.

The spelling of 28704430 in words is "twenty-eight million, seven hundred four thousand, four hundred thirty".