16280328528 has 120 divisors (see below), whose sum is σ = 49798884096. Its totient is φ = 4942771200.

The previous prime is 16280328509. The next prime is 16280328539. The reversal of 16280328528 is 82582308261.

16280328528 is a `hidden beast` number, since 16 + 2 + 80 + 32 + 8 + 528 = 666.

It is a super-3 number, since 3×16280328528³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 31378 + ... + 183153.

Almost surely, 2^16280328528 is an apocalyptic number.

16280328528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16280328528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24899442048).

16280328528 is an abundant number, since it is smaller than the sum of its proper divisors (33518555568).

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

16280328528 is a wasteful number, since it uses less digits than its factorization.

16280328528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214593 (or 214584 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 16280328528 in words is "sixteen billion, two hundred eighty million, three hundred twenty-eight thousand, five hundred twenty-eight".