28250305278872 has 8 divisors (see below), whose sum is σ = 52969322397900. Its totient is φ = 14125152639432.

The previous prime is 28250305278869. The next prime is 28250305278883. The reversal of 28250305278872 is 27887250305282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1765644079922 + ... + 1765644079937.

Almost surely, 2^{28250305278872} is an apocalyptic number.

It is an amenable number.

28250305278872 is a deficient number, since it is larger than the sum of its proper divisors (24719017119028).

28250305278872 is a wasteful number, since it uses less digits than its factorization.

28250305278872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531288159865 (or 3531288159861 counting only the distinct ones).

The product of its (nonzero) digits is 30105600, while the sum is 59.

The spelling of 28250305278872 in words is "twenty-eight trillion, two hundred fifty billion, three hundred five million, two hundred seventy-eight thousand, eight hundred seventy-two".