216673416 has 96 divisors (see below), whose sum is σ = 622440000. Its totient is φ = 67900032.

The previous prime is 216673399. The next prime is 216673421. The reversal of 216673416 is 614376612.

It is a happy number.

It is a super-2 number, since 2×216673416² = 93894738402218112, which contains 22 as substring.

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

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, 203301 + ... + 204363.

It is an arithmetic number, because the mean of its divisors is an integer number (6483750).

Almost surely, 2^216673416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216673416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311220000).

216673416 is an abundant number, since it is smaller than the sum of its proper divisors (405766584).

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

216673416 is a wasteful number, since it uses less digits than its factorization.

216673416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1236 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 216673416 is about 14719.8307055482. The cubic root of 216673416 is about 600.6228864637.

The spelling of 216673416 in words is "two hundred sixteen million, six hundred seventy-three thousand, four hundred sixteen".