28777473 has 6 divisors (see below), whose sum is σ = 41567474. Its totient is φ = 19184976.

The previous prime is 28777459. The next prime is 28777499. The reversal of 28777473 is 37477782.

It can be written as a sum of positive squares in only one way, i.e., 23357889 + 5419584 = 4833^2 + 2328^2 .

It is not a de Polignac number, because 28777473 - 2²¹ = 26680321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28777423) 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 5 ways as a sum of consecutive naturals, for example, 1598740 + ... + 1598757.

Almost surely, 2^28777473 is an apocalyptic number.

It is an amenable number.

28777473 is a deficient number, since it is larger than the sum of its proper divisors (12790001).

28777473 is a wasteful number, since it uses less digits than its factorization.

28777473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197503 (or 3197500 counting only the distinct ones).

The product of its digits is 460992, while the sum is 45.

The square root of 28777473 is about 5364.4639061140. The cubic root of 28777473 is about 306.4438324231.

The spelling of 28777473 in words is "twenty-eight million, seven hundred seventy-seven thousand, four hundred seventy-three".