28705527 has 6 divisors (see below), whose sum is σ = 41463552. Its totient is φ = 19137012.

The previous prime is 28705511. The next prime is 28705529. The reversal of 28705527 is 72550782.

It is not a de Polignac number, because 28705527 - 2⁴ = 28705511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28705491 and 28705500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1594743 + ... + 1594760.

It is an arithmetic number, because the mean of its divisors is an integer number (6910592).

Almost surely, 2^28705527 is an apocalyptic number.

28705527 is a deficient number, since it is larger than the sum of its proper divisors (12758025).

28705527 is a wasteful number, since it uses less digits than its factorization.

28705527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189509 (or 3189506 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 28705527 is about 5357.7539137217. The cubic root of 28705527 is about 306.1882412186.

The spelling of 28705527 in words is "twenty-eight million, seven hundred five thousand, five hundred twenty-seven".