28287127 has 4 divisors (see below), whose sum is σ = 30858696. Its totient is φ = 25715560.

The previous prime is 28287113. The next prime is 28287139. The reversal of 28287127 is 72178282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28287127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287187) 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, 1285768 + ... + 1285789.

It is an arithmetic number, because the mean of its divisors is an integer number (7714674).

Almost surely, 2^28287127 is an apocalyptic number.

28287127 is a deficient number, since it is larger than the sum of its proper divisors (2571569).

28287127 is a wasteful number, since it uses less digits than its factorization.

28287127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571568.

The product of its digits is 25088, while the sum is 37.

The square root of 28287127 is about 5318.5643739641. The cubic root of 28287127 is about 304.6933296645.

The spelling of 28287127 in words is "twenty-eight million, two hundred eighty-seven thousand, one hundred twenty-seven".