28471331489 has 16 divisors (see below), whose sum is σ = 30419712000. Its totient is φ = 26570206080.

The previous prime is 28471331467. The next prime is 28471331507. The reversal of 28471331489 is 98413317482.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28471331489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28471331429) 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, 423584 + ... + 486174.

It is an arithmetic number, because the mean of its divisors is an integer number (1901232000).

Almost surely, 2^28471331489 is an apocalyptic number.

It is an amenable number.

28471331489 is a deficient number, since it is larger than the sum of its proper divisors (1948380511).

28471331489 is a wasteful number, since it uses less digits than its factorization.

28471331489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62968.

The product of its digits is 1161216, while the sum is 50.

The spelling of 28471331489 in words is "twenty-eight billion, four hundred seventy-one million, three hundred thirty-one thousand, four hundred eighty-nine".