27728434 has 16 divisors (see below), whose sum is σ = 42550272. Its totient is φ = 13547248.

The previous prime is 27728431. The next prime is 27728473. The reversal of 27728434 is 43482772.

It is a junction number, because it is equal to n+sod(n) for n = 27728393 and 27728402.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40257 + ... + 40939.

It is an arithmetic number, because the mean of its divisors is an integer number (2659392).

Almost surely, 2^27728434 is an apocalyptic number.

27728434 is a deficient number, since it is larger than the sum of its proper divisors (14821838).

27728434 is a wasteful number, since it uses less digits than its factorization.

27728434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its digits is 75264, while the sum is 37.

The square root of 27728434 is about 5265.7795244389. The cubic root of 27728434 is about 302.6739986601.

The spelling of 27728434 in words is "twenty-seven million, seven hundred twenty-eight thousand, four hundred thirty-four".