28687698 has 24 divisors (see below), whose sum is σ = 66938508. Its totient is φ = 8826912.

The previous prime is 28687697. The next prime is 28687717. The reversal of 28687698 is 89678682.

It can be written as a sum of positive squares in 2 ways, for example, as 20548089 + 8139609 = 4533^2 + 2853^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28687697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61065 + ... + 61532.

Almost surely, 2^28687698 is an apocalyptic number.

28687698 is an abundant number, since it is smaller than the sum of its proper divisors (38250810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28687698 is a wasteful number, since it uses less digits than its factorization.

28687698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122618 (or 122615 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 28687698 is about 5356.0898050724. The cubic root of 28687698 is about 306.1248369278.

The spelling of 28687698 in words is "twenty-eight million, six hundred eighty-seven thousand, six hundred ninety-eight".