28772193 has 8 divisors (see below), whose sum is σ = 38721888. Its totient is φ = 19001984.

The previous prime is 28772189. The next prime is 28772197. The reversal of 28772193 is 39127782.

It is an interprime number because it is at equal distance from previous prime (28772189) and next prime (28772197).

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

It is a cyclic number.

It is not a de Polignac number, because 28772193 - 2² = 28772189 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28772197) 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 7 ways as a sum of consecutive naturals, for example, 44496 + ... + 45137.

It is an arithmetic number, because the mean of its divisors is an integer number (4840236).

Almost surely, 2^28772193 is an apocalyptic number.

It is an amenable number.

28772193 is a deficient number, since it is larger than the sum of its proper divisors (9949695).

28772193 is a wasteful number, since it uses less digits than its factorization.

28772193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89743.

The product of its digits is 42336, while the sum is 39.

The square root of 28772193 is about 5363.9717560778. The cubic root of 28772193 is about 306.4250894941.

The spelling of 28772193 in words is "twenty-eight million, seven hundred seventy-two thousand, one hundred ninety-three".