28378195 has 4 divisors (see below), whose sum is σ = 34053840. Its totient is φ = 22702552.

The previous prime is 28378193. The next prime is 28378199. The reversal of 28378195 is 59187382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28378195 - 2¹ = 28378193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28378193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837815 + ... + 2837824.

It is an arithmetic number, because the mean of its divisors is an integer number (8513460).

Almost surely, 2^28378195 is an apocalyptic number.

28378195 is a deficient number, since it is larger than the sum of its proper divisors (5675645).

28378195 is an equidigital number, since it uses as much as digits as its factorization.

28378195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675644.

The product of its digits is 120960, while the sum is 43.

The square root of 28378195 is about 5327.1188272837. The cubic root of 28378195 is about 305.0199574865.

The spelling of 28378195 in words is "twenty-eight million, three hundred seventy-eight thousand, one hundred ninety-five".