28238195 has 4 divisors (see below), whose sum is σ = 33885840. Its totient is φ = 22590552.

The previous prime is 28238183. The next prime is 28238201. The reversal of 28238195 is 59183282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59183282 = 2 ⋅29591641.

It is a cyclic number.

It is not a de Polignac number, because 28238195 - 2¹⁰ = 28237171 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823815 + ... + 2823824.

It is an arithmetic number, because the mean of its divisors is an integer number (8471460).

Almost surely, 2^28238195 is an apocalyptic number.

28238195 is a deficient number, since it is larger than the sum of its proper divisors (5647645).

28238195 is an equidigital number, since it uses as much as digits as its factorization.

28238195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5647644.

The product of its digits is 34560, while the sum is 38.

The square root of 28238195 is about 5313.9622693429. The cubic root of 28238195 is about 304.5175387577.

The spelling of 28238195 in words is "twenty-eight million, two hundred thirty-eight thousand, one hundred ninety-five".