28698388 has 24 divisors (see below), whose sum is σ = 53528832. Its totient is φ = 13431264.

The previous prime is 28698361. The next prime is 28698389. The reversal of 28698388 is 88389682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28698389) 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, 1006 + ... + 7642.

It is an arithmetic number, because the mean of its divisors is an integer number (2230368).

Almost surely, 2^28698388 is an apocalyptic number.

It is an amenable number.

28698388 is a deficient number, since it is larger than the sum of its proper divisors (24830444).

28698388 is a wasteful number, since it uses less digits than its factorization.

28698388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711 (or 6709 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The square root of 28698388 is about 5357.0876416202. The cubic root of 28698388 is about 306.1628563384.

The spelling of 28698388 in words is "twenty-eight million, six hundred ninety-eight thousand, three hundred eighty-eight".