216894380 has 12 divisors (see below), whose sum is σ = 455478240. Its totient is φ = 86757744.

The previous prime is 216894361. The next prime is 216894397. The reversal of 216894380 is 83498612.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5422340 + ... + 5422379.

It is an arithmetic number, because the mean of its divisors is an integer number (37956520).

Almost surely, 2^216894380 is an apocalyptic number.

216894380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216894380 is an abundant number, since it is smaller than the sum of its proper divisors (238583860).

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

216894380 is a wasteful number, since it uses less digits than its factorization.

216894380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10844728 (or 10844726 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 216894380 is about 14727.3344499268. The cubic root of 216894380 is about 600.8269892539.

The spelling of 216894380 in words is "two hundred sixteen million, eight hundred ninety-four thousand, three hundred eighty".