28697998 has 16 divisors (see below), whose sum is σ = 49273344. Its totient is φ = 12279960.

The previous prime is 28697993. The next prime is 28698011. The reversal of 28697998 is 89979682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28697993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11263 + ... + 13573.

It is an arithmetic number, because the mean of its divisors is an integer number (3079584).

Almost surely, 2^28697998 is an apocalyptic number.

28697998 is a deficient number, since it is larger than the sum of its proper divisors (20575346).

28697998 is a wasteful number, since it uses less digits than its factorization.

28697998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207.

The product of its digits is 3919104, while the sum is 58.

The square root of 28697998 is about 5357.0512411214. The cubic root of 28697998 is about 306.1614694538.

The spelling of 28697998 in words is "twenty-eight million, six hundred ninety-seven thousand, nine hundred ninety-eight".