28699748100 has 81 divisors (see below), whose sum is σ = 89973698997. Its totient is φ = 7651910880.

The previous prime is 28699748087. The next prime is 28699748171. The reversal of 28699748100 is 184799682.

The square root of 28699748100 is 169410.

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

It can be written as a sum of positive squares in only one way, i.e., 10331909316 + 18367838784 = 101646^2 + 135528^2 .

It is a super-2 number, since 2×28699748100² (a number of 22 digits) contains 22 as substring.

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 26 ways as a sum of consecutive naturals, for example, 5079477 + ... + 5085123.

Almost surely, 2^28699748100 is an apocalyptic number.

28699748100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28699748100 is the 169410-th square number.

It is an amenable number.

28699748100 is an abundant number, since it is smaller than the sum of its proper divisors (61273950897).

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

28699748100 is an equidigital number, since it uses as much as digits as its factorization.

28699748100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314 (or 5657 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 28699748100 in words is "twenty-eight billion, six hundred ninety-nine million, seven hundred forty-eight thousand, one hundred".