216304464 has 40 divisors (see below), whose sum is σ = 591658560. Its totient is φ = 67859968.

The previous prime is 216304463. The next prime is 216304483. The reversal of 216304464 is 464403612.

It is a super-2 number, since 2×216304464² = 93575242292654592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216304463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131724 + ... + 133355.

It is an arithmetic number, because the mean of its divisors is an integer number (14791464).

Almost surely, 2^216304464 is an apocalyptic number.

216304464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216304464 is an abundant number, since it is smaller than the sum of its proper divisors (375354096).

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

216304464 is a wasteful number, since it uses less digits than its factorization.

216304464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265107 (or 265101 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 216304464 is about 14707.2928848242. The cubic root of 216304464 is about 600.2817787583.

The spelling of 216304464 in words is "two hundred sixteen million, three hundred four thousand, four hundred sixty-four".