28601489 has 16 divisors (see below), whose sum is σ = 34698240. Its totient is φ = 23044560.

The previous prime is 28601471. The next prime is 28601533. The reversal of 28601489 is 98410682.

It is a de Polignac number, because none of the positive numbers 2^k-28601489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28601389) 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, 7994 + ... + 11004.

It is an arithmetic number, because the mean of its divisors is an integer number (2168640).

Almost surely, 2^28601489 is an apocalyptic number.

It is an amenable number.

28601489 is a deficient number, since it is larger than the sum of its proper divisors (6096751).

28601489 is a wasteful number, since it uses less digits than its factorization.

28601489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 28601489 is about 5348.0359946433. The cubic root of 28601489 is about 305.8178854284.

The spelling of 28601489 in words is "twenty-eight million, six hundred one thousand, four hundred eighty-nine".