28473601 has 4 divisors (see below), whose sum is σ = 30663892. Its totient is φ = 26283312.

The previous prime is 28473553. The next prime is 28473607. The reversal of 28473601 is 10637482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10637482 = 2 ⋅5318741.

It can be written as a sum of positive squares in 2 ways, for example, as 8439025 + 20034576 = 2905^2 + 4476^2 .

It is a cyclic number.

It is not a de Polignac number, because 28473601 - 2¹⁵ = 28440833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28473607) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1095126 + ... + 1095151.

It is an arithmetic number, because the mean of its divisors is an integer number (7665973).

Almost surely, 2^28473601 is an apocalyptic number.

It is an amenable number.

28473601 is a deficient number, since it is larger than the sum of its proper divisors (2190291).

28473601 is a wasteful number, since it uses less digits than its factorization.

28473601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190290.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 28473601 is about 5336.0660603107. The cubic root of 28473601 is about 305.3613954946.

The spelling of 28473601 in words is "twenty-eight million, four hundred seventy-three thousand, six hundred one".