28266698 has 4 divisors (see below), whose sum is σ = 42400050. Its totient is φ = 14133348.

The previous prime is 28266691. The next prime is 28266703. The reversal of 28266698 is 89666282.

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

It can be written as a sum of positive squares in only one way, i.e., 24373969 + 3892729 = 4937^2 + 1973^2 .

It is not an unprimeable number, because it can be changed into a prime (28266691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7066673 + ... + 7066676.

Almost surely, 2^28266698 is an apocalyptic number.

28266698 is a deficient number, since it is larger than the sum of its proper divisors (14133352).

28266698 is a wasteful number, since it uses less digits than its factorization.

28266698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14133351.

The product of its digits is 497664, while the sum is 47.

The square root of 28266698 is about 5316.6434900226. The cubic root of 28266698 is about 304.6199620263.

The spelling of 28266698 in words is "twenty-eight million, two hundred sixty-six thousand, six hundred ninety-eight".