28539161 has 8 divisors (see below), whose sum is σ = 33741120. Its totient is φ = 23618448.

The previous prime is 28539149. The next prime is 28539163. The reversal of 28539161 is 16193582.

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

It is not a de Polignac number, because 28539161 - 2⁶ = 28539097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28539163) 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, 70091 + ... + 70496.

It is an arithmetic number, because the mean of its divisors is an integer number (4217640).

Almost surely, 2^28539161 is an apocalyptic number.

It is an amenable number.

28539161 is a deficient number, since it is larger than the sum of its proper divisors (5201959).

28539161 is a wasteful number, since it uses less digits than its factorization.

28539161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140623.

The product of its digits is 12960, while the sum is 35.

The square root of 28539161 is about 5342.2056306361. The cubic root of 28539161 is about 305.5955790560.

The spelling of 28539161 in words is "twenty-eight million, five hundred thirty-nine thousand, one hundred sixty-one".