28959971 has 8 divisors (see below), whose sum is σ = 30670080. Its totient is φ = 27268488.

The previous prime is 28959947. The next prime is 28959989. The reversal of 28959971 is 17995982.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28959971 - 2⁶ = 28959907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28952971) 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, 1391 + ... + 7736.

It is an arithmetic number, because the mean of its divisors is an integer number (3833760).

Almost surely, 2^28959971 is an apocalyptic number.

28959971 is a deficient number, since it is larger than the sum of its proper divisors (1710109).

28959971 is a wasteful number, since it uses less digits than its factorization.

28959971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9313.

The product of its digits is 408240, while the sum is 50.

The square root of 28959971 is about 5381.4469243875. The cubic root of 28959971 is about 307.0902591226.

The spelling of 28959971 in words is "twenty-eight million, nine hundred fifty-nine thousand, nine hundred seventy-one".