216678472 has 16 divisors (see below), whose sum is σ = 411168240. Its totient is φ = 107033616.

The previous prime is 216678463. The next prime is 216678479. The reversal of 216678472 is 274876612.

It is not an unprimeable number, because it can be changed into a prime (216678479) 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, 162498 + ... + 163825.

It is an arithmetic number, because the mean of its divisors is an integer number (25698015).

Almost surely, 2^216678472 is an apocalyptic number.

It is an amenable number.

216678472 is a deficient number, since it is larger than the sum of its proper divisors (194489768).

216678472 is a wasteful number, since it uses less digits than its factorization.

216678472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326412 (or 326408 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 216678472 is about 14720.0024456520. The cubic root of 216678472 is about 600.6275582038.

The spelling of 216678472 in words is "two hundred sixteen million, six hundred seventy-eight thousand, four hundred seventy-two".