28603861328 has 30 divisors (see below), whose sum is σ = 64468143306. Its totient is φ = 12258797376.

The previous prime is 28603861283. The next prime is 28603861367. The reversal of 28603861328 is 82316830682.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28516401424 + 87459904 = 168868^2 + 9352^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18241475 + ... + 18243042.

Almost surely, 2^28603861328 is an apocalyptic number.

28603861328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28603861328 is an abundant number, since it is smaller than the sum of its proper divisors (35864281978).

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

28603861328 is a wasteful number, since it uses less digits than its factorization.

28603861328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36484539 (or 36484526 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 28603861328 in words is "twenty-eight billion, six hundred three million, eight hundred sixty-one thousand, three hundred twenty-eight".