28187529216 has 416 divisors, whose sum is σ = 96826269696. Its totient is φ = 7085260800.

The previous prime is 28187529199. The next prime is 28187529221. The reversal of 28187529216 is 61292578182.

Its product of digits (967680) is a multiple of the sum of its prime divisors (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, 909275121 + ... + 909275151.

It is an arithmetic number, because the mean of its divisors is an integer number (232755456).

Almost surely, 2^28187529216 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 28187529216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48413134848).

28187529216 is an abundant number, since it is smaller than the sum of its proper divisors (68638740480).

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

28187529216 is an frugal number, since it uses more digits than its factorization.

28187529216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 54 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The spelling of 28187529216 in words is "twenty-eight billion, one hundred eighty-seven million, five hundred twenty-nine thousand, two hundred sixteen".