28195966 has 4 divisors (see below), whose sum is σ = 42293952. Its totient is φ = 14097982.

The previous prime is 28195963. The next prime is 28195997. The reversal of 28195966 is 66959182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66959182 = 2 ⋅33479591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28195963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7048990 + ... + 7048993.

It is an arithmetic number, because the mean of its divisors is an integer number (10573488).

Almost surely, 2^28195966 is an apocalyptic number.

28195966 is a deficient number, since it is larger than the sum of its proper divisors (14097986).

28195966 is a wasteful number, since it uses less digits than its factorization.

28195966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14097985.

The product of its digits is 233280, while the sum is 46.

The square root of 28195966 is about 5309.9873822826. The cubic root of 28195966 is about 304.3656654205.

It can be divided in two parts, 28195 and 966, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28195966 in words is "twenty-eight million, one hundred ninety-five thousand, nine hundred sixty-six".