28372128616 has 64 divisors (see below), whose sum is σ = 57726950400. Its totient is φ = 12995270400.

The previous prime is 28372128601. The next prime is 28372128703. The reversal of 28372128616 is 61682127382.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9751770 + ... + 9754678.

It is an arithmetic number, because the mean of its divisors is an integer number (901983600).

Almost surely, 2^28372128616 is an apocalyptic number.

28372128616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28372128616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28863475200).

28372128616 is an abundant number, since it is smaller than the sum of its proper divisors (29354821784).

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

28372128616 is a wasteful number, since it uses less digits than its factorization.

28372128616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610 (or 3606 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The spelling of 28372128616 in words is "twenty-eight billion, three hundred seventy-two million, one hundred twenty-eight thousand, six hundred sixteen".