216654976 has 32 divisors (see below), whose sum is σ = 434406780. Its totient is φ = 107627520.

The previous prime is 216654973. The next prime is 216655003. The reversal of 216654976 is 679456612.

It can be written as a sum of positive squares in 2 ways, for example, as 206669376 + 9985600 = 14376^2 + 3160^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (216654973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14706 + ... + 25486.

Almost surely, 2^216654976 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 216654976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217203390).

216654976 is an abundant number, since it is smaller than the sum of its proper divisors (217751804).

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

216654976 is a wasteful number, since it uses less digits than its factorization.

216654976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952 (or 10940 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 216654976 is about 14719.2043263214. The cubic root of 216654976 is about 600.6058473018.

The spelling of 216654976 in words is "two hundred sixteen million, six hundred fifty-four thousand, nine hundred seventy-six".