28942193 has 6 divisors (see below), whose sum is σ = 33667506. Its totient is φ = 24807552.

The previous prime is 28942169. The next prime is 28942201. The reversal of 28942193 is 39124982.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 8809024 = 4487^2 + 2968^2 .

It is not a de Polignac number, because 28942193 - 2¹⁰ = 28941169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28942393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 295280 + ... + 295377.

It is an arithmetic number, because the mean of its divisors is an integer number (5611251).

Almost surely, 2^28942193 is an apocalyptic number.

It is an amenable number.

28942193 is a deficient number, since it is larger than the sum of its proper divisors (4725313).

28942193 is an equidigital number, since it uses as much as digits as its factorization.

28942193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590671 (or 590664 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 28942193 is about 5379.7948845658. The cubic root of 28942193 is about 307.0274072162.

The spelling of 28942193 in words is "twenty-eight million, nine hundred forty-two thousand, one hundred ninety-three".