216842320 has 40 divisors (see below), whose sum is σ = 504833760. Its totient is φ = 86620800.

The previous prime is 216842291. The next prime is 216842333. The reversal of 216842320 is 23248612.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 82791 + ... + 85369.

It is an arithmetic number, because the mean of its divisors is an integer number (12620844).

Almost surely, 2^216842320 is an apocalyptic number.

216842320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216842320 is an abundant number, since it is smaller than the sum of its proper divisors (287991440).

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

216842320 is a wasteful number, since it uses less digits than its factorization.

216842320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643 (or 3637 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 216842320 is about 14725.5668821272. The cubic root of 216842320 is about 600.7789143092.

The spelling of 216842320 in words is "two hundred sixteen million, eight hundred forty-two thousand, three hundred twenty".