28956393216 has 252 divisors, whose sum is σ = 91767562992. Its totient is φ = 9083363328.

The previous prime is 28956393209. The next prime is 28956393227. The reversal of 28956393216 is 61239365982.

28956393216 is a `hidden beast` number, since 289 + 5 + 6 + 39 + 321 + 6 = 666.

It is a super-2 number, since 2×28956393216² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3168045 + ... + 3177171.

It is an arithmetic number, because the mean of its divisors is an integer number (364156996).

Almost surely, 2^28956393216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28956393216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45883781496).

28956393216 is an abundant number, since it is smaller than the sum of its proper divisors (62811169776).

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

28956393216 is an frugal number, since it uses more digits than its factorization.

28956393216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9178 (or 9149 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 28956393216 in words is "twenty-eight billion, nine hundred fifty-six million, three hundred ninety-three thousand, two hundred sixteen".