216883446 has 32 divisors (see below), whose sum is σ = 469926240. Its totient is φ = 66729312.

The previous prime is 216883439. The next prime is 216883451. The reversal of 216883446 is 644388612.

It is a junction number, because it is equal to n+sod(n) for n = 216883398 and 216883407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4956 + ... + 21408.

It is an arithmetic number, because the mean of its divisors is an integer number (14685195).

Almost surely, 2^216883446 is an apocalyptic number.

216883446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 216883446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234963120).

216883446 is an abundant number, since it is smaller than the sum of its proper divisors (253042794).

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

216883446 is a wasteful number, since it uses less digits than its factorization.

216883446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16497 (or 16471 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 216883446 is about 14726.9632307547. The cubic root of 216883446 is about 600.8168928609.

The spelling of 216883446 in words is "two hundred sixteen million, eight hundred eighty-three thousand, four hundred forty-six".