28197939264 has 224 divisors, whose sum is σ = 85043589120. Its totient is φ = 8167987200.

The previous prime is 28197939241. The next prime is 28197939271. The reversal of 28197939264 is 46293979182.

It is a junction number, because it is equal to n+sod(n) for n = 28197939198 and 28197939207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5431582 + ... + 5436770.

It is an arithmetic number, because the mean of its divisors is an integer number (379658880).

Almost surely, 2^28197939264 is an apocalyptic number.

28197939264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28197939264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42521794560).

28197939264 is an abundant number, since it is smaller than the sum of its proper divisors (56845649856).

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

28197939264 is a wasteful number, since it uses less digits than its factorization.

28197939264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329 (or 5319 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 60.

The spelling of 28197939264 in words is "twenty-eight billion, one hundred ninety-seven million, nine hundred thirty-nine thousand, two hundred sixty-four".