28891852416 has 192 divisors, whose sum is σ = 98536226880. Its totient is φ = 8254752768.

The previous prime is 28891852403. The next prime is 28891852439. The reversal of 28891852416 is 61425819882.

28891852416 is a `hidden beast` number, since 28 + 8 + 91 + 8 + 524 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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 23 ways as a sum of consecutive naturals, for example, 151380 + ... + 284076.

It is an arithmetic number, because the mean of its divisors is an integer number (513209515).

Almost surely, 2^28891852416 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 28891852416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49268113440).

28891852416 is an abundant number, since it is smaller than the sum of its proper divisors (69644374464).

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

28891852416 is an equidigital number, since it uses as much as digits as its factorization.

28891852416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132733 (or 132709 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The spelling of 28891852416 in words is "twenty-eight billion, eight hundred ninety-one million, eight hundred fifty-two thousand, four hundred sixteen".