28027776 has 64 divisors (see below), whose sum is σ = 85092480. Its totient is φ = 8007168.

The previous prime is 28027771. The next prime is 28027789. The reversal of 28027776 is 67772082.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28027771) 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, 2526 + ... + 7901.

It is an arithmetic number, because the mean of its divisors is an integer number (1329570).

Almost surely, 2^28027776 is an apocalyptic number.

It is an amenable number.

28027776 is an abundant number, since it is smaller than the sum of its proper divisors (57064704).

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

28027776 is a wasteful number, since it uses less digits than its factorization.

28027776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10451 (or 10439 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 28027776 is about 5294.1265568552. The cubic root of 28027776 is about 303.7592738790.

The spelling of 28027776 in words is "twenty-eight million, twenty-seven thousand, seven hundred seventy-six".