28202507489 has 8 divisors (see below), whose sum is σ = 30373463400. Its totient is φ = 26031770496.

The previous prime is 28202507479. The next prime is 28202507507. The reversal of 28202507489 is 98470520282.

It can be written as a sum of positive squares in 4 ways, for example, as 1867709089 + 26334798400 = 43217^2 + 162280^2 .

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 28202507489 - 2²⁴ = 28185730273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28202507479) 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, 296237 + ... + 379685.

It is an arithmetic number, because the mean of its divisors is an integer number (3796682925).

Almost surely, 2^28202507489 is an apocalyptic number.

It is an amenable number.

28202507489 is a deficient number, since it is larger than the sum of its proper divisors (2170955911).

28202507489 is a wasteful number, since it uses less digits than its factorization.

28202507489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109459.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 28202507489 in words is "twenty-eight billion, two hundred two million, five hundred seven thousand, four hundred eighty-nine".