28988832628 has 24 divisors (see below), whose sum is σ = 57982020992. Its totient is φ = 12422852064.

The previous prime is 28988832617. The next prime is 28988832629. The reversal of 28988832628 is 82623888982.

It is a self number, because there is not a number n which added to its sum of digits gives 28988832628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28988832629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446950 + ... + 507682.

Almost surely, 2^28988832628 is an apocalyptic number.

28988832628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28988832628 is an abundant number, since it is smaller than the sum of its proper divisors (28993188364).

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

28988832628 is a wasteful number, since it uses less digits than its factorization.

28988832628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77791 (or 77789 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 64.

The spelling of 28988832628 in words is "twenty-eight billion, nine hundred eighty-eight million, eight hundred thirty-two thousand, six hundred twenty-eight".