28686196900 has 27 divisors (see below), whose sum is σ = 62252722819. Its totient is φ = 11473801280.

The previous prime is 28686196849. The next prime is 28686196927. The reversal of 28686196900 is 969168682.

The square root of 28686196900 is 169370.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2465519716 + 26220677184 = 49654^2 + 161928^2 .

It is a super-2 number, since 2×28686196900² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1685232 + ... + 1702168.

Almost surely, 2^28686196900 is an apocalyptic number.

28686196900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

28686196900 is the 169370-th square number.

It is an amenable number.

28686196900 is an abundant number, since it is smaller than the sum of its proper divisors (33566525919).

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

28686196900 is an frugal number, since it uses more digits than its factorization.

28686196900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33888 (or 16944 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 28686196900 in words is "twenty-eight billion, six hundred eighty-six million, one hundred ninety-six thousand, nine hundred".