28302545 has 8 divisors (see below), whose sum is σ = 34264296. Its totient is φ = 22441216.

The previous prime is 28302529. The next prime is 28302553. The reversal of 28302545 is 54520382.

It can be written as a sum of positive squares in 4 ways, for example, as 2455489 + 25847056 = 1567^2 + 5084^2 .

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 28302545 - 2⁴ = 28302529 is a prime.

It is a Duffinian number.

It is a Curzon 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, 24482 + ... + 25611.

It is an arithmetic number, because the mean of its divisors is an integer number (4283037).

Almost surely, 2^28302545 is an apocalyptic number.

It is an amenable number.

28302545 is a deficient number, since it is larger than the sum of its proper divisors (5961751).

28302545 is a wasteful number, since it uses less digits than its factorization.

28302545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50211.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 28302545 is about 5320.0136278021. The cubic root of 28302545 is about 304.7486776738.

The spelling of 28302545 in words is "twenty-eight million, three hundred two thousand, five hundred forty-five".