28527145 has 8 divisors (see below), whose sum is σ = 34261704. Its totient is φ = 22802304.

The previous prime is 28527143. The next prime is 28527209. The reversal of 28527145 is 54172582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 267289 + 28259856 = 517^2 + 5316^2 .

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 28527145 - 2¹ = 28527143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28527145.

It is not an unprimeable number, because it can be changed into a prime (28527143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8557 + ... + 11413.

It is an arithmetic number, because the mean of its divisors is an integer number (4282713).

Almost surely, 2^28527145 is an apocalyptic number.

It is an amenable number.

28527145 is a deficient number, since it is larger than the sum of its proper divisors (5734559).

28527145 is a wasteful number, since it uses less digits than its factorization.

28527145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859.

The product of its digits is 22400, while the sum is 34.

The square root of 28527145 is about 5341.0808831172. The cubic root of 28527145 is about 305.5526841726.

The spelling of 28527145 in words is "twenty-eight million, five hundred twenty-seven thousand, one hundred forty-five".