28837813489 has 3 divisors (see below), whose sum is σ = 28837983307. Its totient is φ = 28837643672.

The previous prime is 28837813481. The next prime is 28837813531. The reversal of 28837813489 is 98431873882.

The square root of 28837813489 is 169817.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 17642480625 + 11195332864 = 132825^2 + 105808^2 .

It is not a de Polignac number, because 28837813489 - 2³ = 28837813481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28837813481) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 84909 + ... + 254725.

Almost surely, 2^28837813489 is an apocalyptic number.

28837813489 is the 169817-th square number.

28837813489 is the 84909-th centered octagonal number.

It is an amenable number.

28837813489 is a deficient number, since it is larger than the sum of its proper divisors (169818).

28837813489 is an frugal number, since it uses more digits than its factorization.

28837813489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339634 (or 169817 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 61.

The spelling of 28837813489 in words is "twenty-eight billion, eight hundred thirty-seven million, eight hundred thirteen thousand, four hundred eighty-nine".