28918052072 has 96 divisors (see below), whose sum is σ = 69207906600. Its totient is φ = 11224152576.

The previous prime is 28918052029. The next prime is 28918052081. The reversal of 28918052072 is 27025081982.

It can be written as a sum of positive squares in 4 ways, for example, as 27806896516 + 1111155556 = 166754^2 + 33334^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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, 216554 + ... + 323622.

Almost surely, 2^28918052072 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 28918052072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34603953300).

28918052072 is an abundant number, since it is smaller than the sum of its proper divisors (40289854528).

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

28918052072 is a wasteful number, since it uses less digits than its factorization.

28918052072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107155 (or 107144 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 28918052072 in words is "twenty-eight billion, nine hundred eighteen million, fifty-two thousand, seventy-two".