28719378468 has 180 divisors, whose sum is σ = 87007783632. Its totient is φ = 8190616320.

The previous prime is 28719378433. The next prime is 28719378473. The reversal of 28719378468 is 86487391782.

28719378468 is a `hidden beast` number, since 2 + 87 + 1 + 93 + 7 + 8 + 468 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1016055 + ... + 1043937.

Almost surely, 2^28719378468 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 28719378468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43503891816).

28719378468 is an abundant number, since it is smaller than the sum of its proper divisors (58288405164).

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

28719378468 is a wasteful number, since it uses less digits than its factorization.

28719378468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27944 (or 27916 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 28719378468 in words is "twenty-eight billion, seven hundred nineteen million, three hundred seventy-eight thousand, four hundred sixty-eight".