28572973 has 8 divisors (see below), whose sum is σ = 33568416. Its totient is φ = 23977200.

The previous prime is 28572967. The next prime is 28572977. The reversal of 28572973 is 37927582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28572973 - 2²¹ = 26475821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28572977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99763 + ... + 100048.

It is an arithmetic number, because the mean of its divisors is an integer number (4196052).

Almost surely, 2^28572973 is an apocalyptic number.

It is an amenable number.

28572973 is a deficient number, since it is larger than the sum of its proper divisors (4995443).

28572973 is a wasteful number, since it uses less digits than its factorization.

28572973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199835.

The product of its digits is 211680, while the sum is 43.

The square root of 28572973 is about 5345.3693043606. The cubic root of 28572973 is about 305.7162170311.

The spelling of 28572973 in words is "twenty-eight million, five hundred seventy-two thousand, nine hundred seventy-three".