28160525 has 6 divisors (see below), whose sum is σ = 34919082. Its totient is φ = 22528400.

The previous prime is 28160521. The next prime is 28160611. The reversal of 28160525 is 52506182.

It can be written as a sum of positive squares in 3 ways, for example, as 6889 + 28153636 = 83^2 + 5306^2 .

It is not a de Polignac number, because 28160525 - 2² = 28160521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28160521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 563186 + ... + 563235.

It is an arithmetic number, because the mean of its divisors is an integer number (5819847).

Almost surely, 2^28160525 is an apocalyptic number.

28160525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28160525 is a deficient number, since it is larger than the sum of its proper divisors (6758557).

28160525 is a wasteful number, since it uses less digits than its factorization.

28160525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126431 (or 1126426 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 28160525 is about 5306.6491310431. The cubic root of 28160525 is about 304.2380875216.

It can be divided in two parts, 281 and 60525, that added together give a palindrome (60806).

The spelling of 28160525 in words is "twenty-eight million, one hundred sixty thousand, five hundred twenty-five".