27728694 has 72 divisors (see below), whose sum is σ = 71257680. Its totient is φ = 7633440.

The previous prime is 27728681. The next prime is 27728707. The reversal of 27728694 is 49682772.

It is an interprime number because it is at equal distance from previous prime (27728681) and next prime (27728707).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 120972 + ... + 121200.

It is an arithmetic number, because the mean of its divisors is an integer number (989690).

Almost surely, 2^27728694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27728694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35628840).

27728694 is an abundant number, since it is smaller than the sum of its proper divisors (43528986).

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

27728694 is a wasteful number, since it uses less digits than its factorization.

27728694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 272 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 27728694 is about 5265.8042120838. The cubic root of 27728694 is about 302.6749446806.

The spelling of 27728694 in words is "twenty-seven million, seven hundred twenty-eight thousand, six hundred ninety-four".