28525345 has 4 divisors (see below), whose sum is σ = 34230420. Its totient is φ = 22820272.

The previous prime is 28525333. The next prime is 28525349. The reversal of 28525345 is 54352582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54352582 = 2 ⋅27176291.

It can be written as a sum of positive squares in 2 ways, for example, as 19088161 + 9437184 = 4369^2 + 3072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28525345 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28525345.

It is not an unprimeable number, because it can be changed into a prime (28525349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852530 + ... + 2852539.

It is an arithmetic number, because the mean of its divisors is an integer number (8557605).

Almost surely, 2^28525345 is an apocalyptic number.

It is an amenable number.

28525345 is a deficient number, since it is larger than the sum of its proper divisors (5705075).

28525345 is an equidigital number, since it uses as much as digits as its factorization.

28525345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705074.

The product of its digits is 48000, while the sum is 34.

The square root of 28525345 is about 5340.9123752408. The cubic root of 28525345 is about 305.5462574704.

The spelling of 28525345 in words is "twenty-eight million, five hundred twenty-five thousand, three hundred forty-five".