28659679 has 4 divisors (see below), whose sum is σ = 29905776. Its totient is φ = 27413584.

The previous prime is 28659677. The next prime is 28659713. The reversal of 28659679 is 97695682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28659679 - 2¹ = 28659677 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 (28659677) 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, 623014 + ... + 623059.

It is an arithmetic number, because the mean of its divisors is an integer number (7476444).

Almost surely, 2^28659679 is an apocalyptic number.

28659679 is a deficient number, since it is larger than the sum of its proper divisors (1246097).

28659679 is a wasteful number, since it uses less digits than its factorization.

28659679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246096.

The product of its digits is 1632960, while the sum is 52.

The square root of 28659679 is about 5353.4735452788. The cubic root of 28659679 is about 306.0251413976.

It can be divided in two parts, 2865 and 9679, that added together give a square (12544 = 112²).

The spelling of 28659679 in words is "twenty-eight million, six hundred fifty-nine thousand, six hundred seventy-nine".