2389868728 has 64 divisors (see below), whose sum is σ = 5075804160. Its totient is φ = 1046618496.

The previous prime is 2389868713. The next prime is 2389868731. The reversal of 2389868728 is 8278689832.

It is a super-2 number, since 2×2389868728² = 11422945074144675968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299851 + ... + 307717.

It is an arithmetic number, because the mean of its divisors is an integer number (79309440).

Almost surely, 2^2389868728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2389868728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2537902080).

2389868728 is an abundant number, since it is smaller than the sum of its proper divisors (2685935432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2389868728 is a wasteful number, since it uses less digits than its factorization.

2389868728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8036 (or 8032 counting only the distinct ones).

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

The square root of 2389868728 is about 48886.2836386649. The cubic root of 2389868728 is about 1336.9792965159.

The spelling of 2389868728 in words is "two billion, three hundred eighty-nine million, eight hundred sixty-eight thousand, seven hundred twenty-eight".