28228197372 has 24 divisors (see below), whose sum is σ = 67990497792. Its totient is φ = 9105870000.

The previous prime is 28228197359. The next prime is 28228197377. The reversal of 28228197372 is 27379182282.

It is a super-2 number, since 2×28228197372² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228197377) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 37940754 + ... + 37941497.

It is an arithmetic number, because the mean of its divisors is an integer number (2832937408).

Almost surely, 2^28228197372 is an apocalyptic number.

It is an amenable number.

28228197372 is an abundant number, since it is smaller than the sum of its proper divisors (39762300420).

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

28228197372 is a wasteful number, since it uses less digits than its factorization.

28228197372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75882289 (or 75882287 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The spelling of 28228197372 in words is "twenty-eight billion, two hundred twenty-eight million, one hundred ninety-seven thousand, three hundred seventy-two".