216073880 has 64 divisors (see below), whose sum is σ = 531878400. Its totient is φ = 78348160.

The previous prime is 216073877. The next prime is 216073901. The reversal of 216073880 is 88370612.

It is a self number, because there is not a number n which added to its sum of digits gives 216073880.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 300161 + ... + 300879.

It is an arithmetic number, because the mean of its divisors is an integer number (8310600).

Almost surely, 2^216073880 is an apocalyptic number.

216073880 is a gapful number since it is divisible by the number (20) 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 216073880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265939200).

216073880 is an abundant number, since it is smaller than the sum of its proper divisors (315804520).

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

216073880 is a wasteful number, since it uses less digits than its factorization.

216073880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 216073880 is about 14699.4516904543. The cubic root of 216073880 is about 600.0683996096.

The spelling of 216073880 in words is "two hundred sixteen million, seventy-three thousand, eight hundred eighty".