27728830 has 8 divisors (see below), whose sum is σ = 49911912. Its totient is φ = 11091528.

The previous prime is 27728803. The next prime is 27728839. The reversal of 27728830 is 3882772.

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

It is a self number, because there is not a number n which added to its sum of digits gives 27728830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728839) 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, 1386432 + ... + 1386451.

It is an arithmetic number, because the mean of its divisors is an integer number (6238989).

Almost surely, 2^27728830 is an apocalyptic number.

27728830 is a deficient number, since it is larger than the sum of its proper divisors (22183082).

27728830 is a wasteful number, since it uses less digits than its factorization.

27728830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772890.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 27728830 is about 5265.8171255751. The cubic root of 27728830 is about 302.6754395196.

The spelling of 27728830 in words is "twenty-seven million, seven hundred twenty-eight thousand, eight hundred thirty".