28175545 has 16 divisors (see below), whose sum is σ = 35925120. Its totient is φ = 21140224.

The previous prime is 28175527. The next prime is 28175573. The reversal of 28175545 is 54557182.

It is a cyclic number.

It is not a de Polignac number, because 28175545 - 2⁷ = 28175417 is a prime.

It is a super-2 number, since 2×28175545² = 1587722672094050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42426 + ... + 43084.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^28175545 is an apocalyptic number.

It is an amenable number.

28175545 is a deficient number, since it is larger than the sum of its proper divisors (7749575).

28175545 is a wasteful number, since it uses less digits than its factorization.

28175545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184.

The product of its digits is 56000, while the sum is 37.

The square root of 28175545 is about 5308.0641480675. The cubic root of 28175545 is about 304.2921684720.

The spelling of 28175545 in words is "twenty-eight million, one hundred seventy-five thousand, five hundred forty-five".