28321454011968 has 224 divisors, whose sum is σ = 90309510211200. Its totient is φ = 8651599828992.

The previous prime is 28321454011931. The next prime is 28321454011973. The reversal of 28321454011968 is 86911045412382.

28321454011968 is a `hidden beast` number, since 2 + 8 + 3 + 2 + 1 + 4 + 540 + 1 + 1 + 96 + 8 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1412571 + ... + 7657562.

It is an arithmetic number, because the mean of its divisors is an integer number (403167456300).

Almost surely, 2^{28321454011968} 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 28321454011968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45154755105600).

28321454011968 is an abundant number, since it is smaller than the sum of its proper divisors (61988056199232).

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

28321454011968 is a wasteful number, since it uses less digits than its factorization.

28321454011968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9070306 (or 9070290 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 28321454011968 in words is "twenty-eight trillion, three hundred twenty-one billion, four hundred fifty-four million, eleven thousand, nine hundred sixty-eight".