28525445 has 8 divisors (see below), whose sum is σ = 36863736. Its totient is φ = 21064896.

The previous prime is 28525429. The next prime is 28525493. The reversal of 28525445 is 54452582.

It can be written as a sum of positive squares in 4 ways, for example, as 1162084 + 27363361 = 1078^2 + 5231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28525445 - 2⁴ = 28525429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219362 + ... + 219491.

It is an arithmetic number, because the mean of its divisors is an integer number (4607967).

Almost surely, 2^28525445 is an apocalyptic number.

It is an amenable number.

28525445 is a deficient number, since it is larger than the sum of its proper divisors (8338291).

28525445 is a wasteful number, since it uses less digits than its factorization.

28525445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438871.

The product of its digits is 64000, while the sum is 35.

The square root of 28525445 is about 5340.9217369289. The cubic root of 28525445 is about 305.5466145165.

The spelling of 28525445 in words is "twenty-eight million, five hundred twenty-five thousand, four hundred forty-five".