28732473 has 36 divisors (see below), whose sum is σ = 52676208. Its totient is φ = 14923440.

The previous prime is 28732439. The next prime is 28732477. The reversal of 28732473 is 37423782.

It is not a de Polignac number, because 28732473 - 2⁶ = 28732409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28732477) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1890 + ... + 7812.

It is an arithmetic number, because the mean of its divisors is an integer number (1463228).

Almost surely, 2^28732473 is an apocalyptic number.

It is an amenable number.

28732473 is a deficient number, since it is larger than the sum of its proper divisors (23943735).

28732473 is a wasteful number, since it uses less digits than its factorization.

28732473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5954 (or 5944 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 28732473 is about 5360.2679970315. The cubic root of 28732473 is about 306.2840179899.

Subtracting from 28732473 its product of digits (56448), we obtain a square (28676025 = 5355²).

The spelling of 28732473 in words is "twenty-eight million, seven hundred thirty-two thousand, four hundred seventy-three".