28156527 has 30 divisors (see below), whose sum is σ = 47482552. Its totient is φ = 16077096.

The previous prime is 28156523. The next prime is 28156547. The reversal of 28156527 is 72565182.

It is a happy number.

28156527 is a `hidden beast` number, since 2 + 81 + 56 + 527 = 666.

It is not a de Polignac number, because 28156527 - 2² = 28156523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28156491 and 28156500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28156523) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 20958 + ... + 22260.

Almost surely, 2^28156527 is an apocalyptic number.

28156527 is a deficient number, since it is larger than the sum of its proper divisors (19326025).

28156527 is an equidigital number, since it uses as much as digits as its factorization.

28156527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337 (or 1313 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 28156527 is about 5306.2724204473. The cubic root of 28156527 is about 304.2236890987.

The spelling of 28156527 in words is "twenty-eight million, one hundred fifty-six thousand, five hundred twenty-seven".