28698988 has 6 divisors (see below), whose sum is σ = 50223236. Its totient is φ = 14349492.

The previous prime is 28698983. The next prime is 28698991. The reversal of 28698988 is 88989682.

It is not an unprimeable number, because it can be changed into a prime (28698983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3587370 + ... + 3587377.

Almost surely, 2^28698988 is an apocalyptic number.

It is an amenable number.

28698988 is a deficient number, since it is larger than the sum of its proper divisors (21524248).

28698988 is a wasteful number, since it uses less digits than its factorization.

28698988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174751 (or 7174749 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 58.

The square root of 28698988 is about 5357.1436419047. The cubic root of 28698988 is about 306.1649899825.

The spelling of 28698988 in words is "twenty-eight million, six hundred ninety-eight thousand, nine hundred eighty-eight".