28951915968 has 112 divisors (see below), whose sum is σ = 85299458560. Its totient is φ = 9629528832.

The previous prime is 28951915939. The next prime is 28951915973. The reversal of 28951915968 is 86951915982.

28951915968 is a `hidden beast` number, since 2 + 8 + 9 + 519 + 1 + 59 + 68 = 666.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 781971 + ... + 818157.

Almost surely, 2^28951915968 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 28951915968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42649729280).

28951915968 is an abundant number, since it is smaller than the sum of its proper divisors (56347542592).

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

28951915968 is a wasteful number, since it uses less digits than its factorization.

28951915968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36671 (or 36655 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 63.

The spelling of 28951915968 in words is "twenty-eight billion, nine hundred fifty-one million, nine hundred fifteen thousand, nine hundred sixty-eight".