28698079 has 4 divisors (see below), whose sum is σ = 28904680. Its totient is φ = 28491480.

The previous prime is 28698067. The next prime is 28698083. The reversal of 28698079 is 97089682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97089682 = 2 ⋅48544841.

It is a cyclic number.

It is not a de Polignac number, because 28698079 - 2¹⁹ = 28173791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28698029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103092 + ... + 103369.

It is an arithmetic number, because the mean of its divisors is an integer number (7226170).

Almost surely, 2^28698079 is an apocalyptic number.

28698079 is a deficient number, since it is larger than the sum of its proper divisors (206601).

28698079 is a wasteful number, since it uses less digits than its factorization.

28698079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206600.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 28698079 is about 5357.0588012453. The cubic root of 28698079 is about 306.1617575001.

The spelling of 28698079 in words is "twenty-eight million, six hundred ninety-eight thousand, seventy-nine".