5287817998 has 4 divisors (see below), whose sum is σ = 7931727000. Its totient is φ = 2643908998.

The previous prime is 5287817993. The next prime is 5287818007. The reversal of 5287817998 is 8997187825.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×5287817998² = 55922038359945456008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5287817993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321954498 + ... + 1321954501.

It is an arithmetic number, because the mean of its divisors is an integer number (1982931750).

Almost surely, 2^5287817998 is an apocalyptic number.

5287817998 is a deficient number, since it is larger than the sum of its proper divisors (2643909002).

5287817998 is a wasteful number, since it uses less digits than its factorization.

5287817998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643909001.

The product of its digits is 20321280, while the sum is 64.

The square root of 5287817998 is about 72717.3844276594. The cubic root of 5287817998 is about 1742.1765599146.

It can be divided in two parts, 52878 and 17998, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 5287817998 in words is "five billion, two hundred eighty-seven million, eight hundred seventeen thousand, nine hundred ninety-eight".