27728430 has 16 divisors (see below), whose sum is σ = 66548304. Its totient is φ = 7394240.

The previous prime is 27728417. The next prime is 27728431. The reversal of 27728430 is 3482772.

It is a junction number, because it is equal to n+sod(n) for n = 27728391 and 27728400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462111 + ... + 462170.

It is an arithmetic number, because the mean of its divisors is an integer number (4159269).

Almost surely, 2^27728430 is an apocalyptic number.

27728430 is an abundant number, since it is smaller than the sum of its proper divisors (38819874).

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

27728430 is a wasteful number, since it uses less digits than its factorization.

27728430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924291.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 27728430 is about 5265.7791446281. The cubic root of 27728430 is about 302.6739841059.

The spelling of 27728430 in words is "twenty-seven million, seven hundred twenty-eight thousand, four hundred thirty".