28065294100 has 18 divisors (see below), whose sum is σ = 60901688414. Its totient is φ = 11226117600.

The previous prime is 28065294091. The next prime is 28065294119. The reversal of 28065294100 is 149256082.

It can be written as a sum of positive squares in 3 ways, for example, as 1712966544 + 26352327556 = 41388^2 + 162334^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28065294100.

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, 140326371 + ... + 140326570.

Almost surely, 2^28065294100 is an apocalyptic number.

28065294100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28065294100 is an abundant number, since it is smaller than the sum of its proper divisors (32836394314).

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

28065294100 is a wasteful number, since it uses less digits than its factorization.

28065294100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280652955 (or 280652948 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 28065294100 in words is "twenty-eight billion, sixty-five million, two hundred ninety-four thousand, one hundred".