28670473 has 16 divisors (see below), whose sum is σ = 32271120. Its totient is φ = 25288704.

The previous prime is 28670459. The next prime is 28670479. The reversal of 28670473 is 37407682.

It can be written as a sum of positive squares in 8 ways, for example, as 9072144 + 19598329 = 3012^2 + 4427^2 .

It is a cyclic number.

It is not a de Polignac number, because 28670473 - 2²¹ = 26573321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28670479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42265 + ... + 42937.

It is an arithmetic number, because the mean of its divisors is an integer number (2016945).

Almost surely, 2^28670473 is an apocalyptic number.

It is an amenable number.

28670473 is a deficient number, since it is larger than the sum of its proper divisors (3600647).

28670473 is a wasteful number, since it uses less digits than its factorization.

28670473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 28670473 is about 5354.4815808816. The cubic root of 28670473 is about 306.0635556540.

The spelling of 28670473 in words is "twenty-eight million, six hundred seventy thousand, four hundred seventy-three".