28863971236 has 9 divisors (see below), whose sum is σ = 50512544299. Its totient is φ = 14431815724.

The previous prime is 28863971221. The next prime is 28863971251. The reversal of 28863971236 is 63217936882.

The square root of 28863971236 is 169894.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (28863971221) and next prime (28863971251).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 297315 + ... + 382261.

Almost surely, 2^28863971236 is an apocalyptic number.

28863971236 is the 169894-th square number.

It is an amenable number.

28863971236 is a deficient number, since it is larger than the sum of its proper divisors (21648573063).

28863971236 is an frugal number, since it uses more digits than its factorization.

28863971236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169898 (or 84949 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 55.

The spelling of 28863971236 in words is "twenty-eight billion, eight hundred sixty-three million, nine hundred seventy-one thousand, two hundred thirty-six".