28075545 has 16 divisors (see below), whose sum is σ = 49912320. Its totient is φ = 14973552.

The previous prime is 28075543. The next prime is 28075549. The reversal of 28075545 is 54557082.

It is a happy number.

It is not a de Polignac number, because 28075545 - 2¹ = 28075543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28075543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103849 + ... + 104118.

It is an arithmetic number, because the mean of its divisors is an integer number (3119520).

Almost surely, 2^28075545 is an apocalyptic number.

It is an amenable number.

28075545 is a deficient number, since it is larger than the sum of its proper divisors (21836775).

28075545 is a wasteful number, since it uses less digits than its factorization.

28075545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207981 (or 207975 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 28075545 is about 5298.6361452736. The cubic root of 28075545 is about 303.9317461323.

The spelling of 28075545 in words is "twenty-eight million, seventy-five thousand, five hundred forty-five".