27989528 has 64 divisors (see below), whose sum is σ = 64696320. Its totient is φ = 11088000.

The previous prime is 27989519. The next prime is 27989537. The reversal of 27989528 is 82598972.

It is an interprime number because it is at equal distance from previous prime (27989519) and next prime (27989537).

Its product of digits (725760) is a multiple of the sum of its prime factors (768).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39578 + ... + 40278.

It is an arithmetic number, because the mean of its divisors is an integer number (1010880).

Almost surely, 2^27989528 is an apocalyptic number.

27989528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27989528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32348160).

27989528 is an abundant number, since it is smaller than the sum of its proper divisors (36706792).

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

27989528 is a wasteful number, since it uses less digits than its factorization.

27989528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 764 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 27989528 is about 5290.5130186023. The cubic root of 27989528 is about 303.6210363247.

The spelling of 27989528 in words is "twenty-seven million, nine hundred eighty-nine thousand, five hundred twenty-eight".