28669607 has 4 divisors (see below), whose sum is σ = 28815336. Its totient is φ = 28523880.

The previous prime is 28669591. The next prime is 28669639. The reversal of 28669607 is 70696682.

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 28669607 - 2⁴ = 28669591 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 (28669807) 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, 72569 + ... + 72962.

It is an arithmetic number, because the mean of its divisors is an integer number (7203834).

Almost surely, 2^28669607 is an apocalyptic number.

28669607 is a deficient number, since it is larger than the sum of its proper divisors (145729).

28669607 is a wasteful number, since it uses less digits than its factorization.

28669607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145728.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 28669607 is about 5354.4007134319. The cubic root of 28669607 is about 306.0604740433.

The spelling of 28669607 in words is "twenty-eight million, six hundred sixty-nine thousand, six hundred seven".