28719089 has 16 divisors (see below), whose sum is σ = 34769280. Its totient is φ = 23172480.

The previous prime is 28719073. The next prime is 28719101. The reversal of 28719089 is 98091782.

It is a cyclic number.

It is not a de Polignac number, because 28719089 - 2⁴ = 28719073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28719029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23477 + ... + 24669.

It is an arithmetic number, because the mean of its divisors is an integer number (2173080).

Almost surely, 2^28719089 is an apocalyptic number.

It is an amenable number.

28719089 is a deficient number, since it is larger than the sum of its proper divisors (6050191).

28719089 is a wasteful number, since it uses less digits than its factorization.

28719089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 28719089 is about 5359.0194065706. The cubic root of 28719089 is about 306.2364534338.

The spelling of 28719089 in words is "twenty-eight million, seven hundred nineteen thousand, eighty-nine".