27728358 has 16 divisors (see below), whose sum is σ = 63379200. Its totient is φ = 7922376.

The previous prime is 27728347. The next prime is 27728359. The reversal of 27728358 is 85382772.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 660199 = 27728358 / (2 + 7 + 7 + 2 + 8 + 3 + 5 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728359) 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, 330058 + ... + 330141.

It is an arithmetic number, because the mean of its divisors is an integer number (3961200).

Almost surely, 2^27728358 is an apocalyptic number.

27728358 is an abundant number, since it is smaller than the sum of its proper divisors (35650842).

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

27728358 is a wasteful number, since it uses less digits than its factorization.

27728358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660211.

The product of its digits is 188160, while the sum is 42.

The square root of 27728358 is about 5265.7723080285. The cubic root of 27728358 is about 302.6737221300.

The spelling of 27728358 in words is "twenty-seven million, seven hundred twenty-eight thousand, three hundred fifty-eight".