28607545 has 16 divisors (see below), whose sum is σ = 35843472. Its totient is φ = 21898240.

The previous prime is 28607519. The next prime is 28607563. The reversal of 28607545 is 54570682.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4822416 + 23785129 = 2196^2 + 4877^2 .

It is not a de Polignac number, because 28607545 - 2⁷ = 28607417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9549 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (2240217).

Almost surely, 2^28607545 is an apocalyptic number.

It is an amenable number.

28607545 is a deficient number, since it is larger than the sum of its proper divisors (7235927).

28607545 is a wasteful number, since it uses less digits than its factorization.

28607545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 28607545 is about 5348.6021538342. The cubic root of 28607545 is about 305.8394682489.

The spelling of 28607545 in words is "twenty-eight million, six hundred seven thousand, five hundred forty-five".