28722195 has 20 divisors (see below), whose sum is σ = 51487920. Its totient is φ = 15318288.

The previous prime is 28722179. The next prime is 28722229. The reversal of 28722195 is 59122782.

It is not a de Polignac number, because 28722195 - 2⁴ = 28722179 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35055 + ... + 35864.

It is an arithmetic number, because the mean of its divisors is an integer number (2574396).

Almost surely, 2^28722195 is an apocalyptic number.

28722195 is a deficient number, since it is larger than the sum of its proper divisors (22765725).

28722195 is an equidigital number, since it uses as much as digits as its factorization.

28722195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70936 (or 70927 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 28722195 is about 5359.3091905581. The cubic root of 28722195 is about 306.2474929685.

The spelling of 28722195 in words is "twenty-eight million, seven hundred twenty-two thousand, one hundred ninety-five".