28195798 has 4 divisors (see below), whose sum is σ = 42293700. Its totient is φ = 14097898.

The previous prime is 28195781. The next prime is 28195807. The reversal of 28195798 is 89759182.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7048948 + ... + 7048951.

It is an arithmetic number, because the mean of its divisors is an integer number (10573425).

Almost surely, 2^28195798 is an apocalyptic number.

28195798 is a deficient number, since it is larger than the sum of its proper divisors (14097902).

28195798 is a wasteful number, since it uses less digits than its factorization.

28195798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14097901.

The product of its digits is 362880, while the sum is 49.

The square root of 28195798 is about 5309.9715630124. The cubic root of 28195798 is about 304.3650609187.

The spelling of 28195798 in words is "twenty-eight million, one hundred ninety-five thousand, seven hundred ninety-eight".