28959909 has 8 divisors (see below), whose sum is σ = 42123552. Its totient is φ = 17551440.

The previous prime is 28959907. The next prime is 28959913. The reversal of 28959909 is 90995982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28959909 - 2¹ = 28959907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28959907) 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, 438754 + ... + 438819.

It is an arithmetic number, because the mean of its divisors is an integer number (5265444).

Almost surely, 2^28959909 is an apocalyptic number.

It is an amenable number.

28959909 is a deficient number, since it is larger than the sum of its proper divisors (13163643).

28959909 is a wasteful number, since it uses less digits than its factorization.

28959909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877587.

The product of its (nonzero) digits is 524880, while the sum is 51.

The square root of 28959909 is about 5381.4411638519. The cubic root of 28959909 is about 307.0900399740.

The spelling of 28959909 in words is "twenty-eight million, nine hundred fifty-nine thousand, nine hundred nine".