16535880 has 128 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 4320000.

The previous prime is 16535879. The next prime is 16535891. The reversal of 16535880 is 8853561.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65755 + ... + 66005.

It is an arithmetic number, because the mean of its divisors is an integer number (439425).

Almost surely, 2^16535880 is an apocalyptic number.

16535880 is a gapful number since it is divisible by the number (10) 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 16535880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28123200).

16535880 is an abundant number, since it is smaller than the sum of its proper divisors (39710520).

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

16535880 is a wasteful number, since it uses less digits than its factorization.

16535880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 16535880 is about 4066.4333266390. The cubic root of 16535880 is about 254.7665683846.

The spelling of 16535880 in words is "sixteen million, five hundred thirty-five thousand, eight hundred eighty".