28989161 has 8 divisors (see below), whose sum is σ = 29484000. Its totient is φ = 28497952.

The previous prime is 28989157. The next prime is 28989197. The reversal of 28989161 is 16198982.

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 28989161 - 2² = 28989157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28989101) 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, 18590 + ... + 20088.

It is an arithmetic number, because the mean of its divisors is an integer number (3685500).

Almost surely, 2^28989161 is an apocalyptic number.

It is an amenable number.

28989161 is a deficient number, since it is larger than the sum of its proper divisors (494839).

28989161 is a wasteful number, since it uses less digits than its factorization.

28989161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815.

The product of its digits is 62208, while the sum is 44.

The square root of 28989161 is about 5384.1583371963. The cubic root of 28989161 is about 307.1934009689.

The spelling of 28989161 in words is "twenty-eight million, nine hundred eighty-nine thousand, one hundred sixty-one".