28066797 has 40 divisors (see below), whose sum is σ = 46382400. Its totient is φ = 16770600.

The previous prime is 28066793. The next prime is 28066879. The reversal of 28066797 is 79766082.

It is a happy number.

28066797 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 28066797 - 2² = 28066793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28066793) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 395272 + ... + 395342.

It is an arithmetic number, because the mean of its divisors is an integer number (1159560).

Almost surely, 2^28066797 is an apocalyptic number.

28066797 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28066797 is a deficient number, since it is larger than the sum of its proper divisors (18315603).

28066797 is an frugal number, since it uses more digits than its factorization.

28066797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 28066797 is about 5297.8105855155. The cubic root of 28066797 is about 303.9001757020.

The spelling of 28066797 in words is "twenty-eight million, sixty-six thousand, seven hundred ninety-seven".