28197698 has 8 divisors (see below), whose sum is σ = 42474240. Its totient is φ = 14039620.

The previous prime is 28197647. The next prime is 28197731. The reversal of 28197698 is 89679182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28197698² = 1590220344998408, which contains 22 as substring.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 29018 + ... + 29973.

It is an arithmetic number, because the mean of its divisors is an integer number (5309280).

Almost surely, 2^28197698 is an apocalyptic number.

28197698 is a deficient number, since it is larger than the sum of its proper divisors (14276542).

28197698 is a wasteful number, since it uses less digits than its factorization.

28197698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59232.

The product of its digits is 435456, while the sum is 50.

The square root of 28197698 is about 5310.1504686779. The cubic root of 28197698 is about 304.3718974058.

It can be divided in two parts, 281 and 97698, that added together give a palindrome (97979).

The spelling of 28197698 in words is "twenty-eight million, one hundred ninety-seven thousand, six hundred ninety-eight".