16072218 has 12 divisors (see below), whose sum is σ = 34823178. Its totient is φ = 5357400.

The previous prime is 16072211. The next prime is 16072241. The reversal of 16072218 is 81227061.

It can be written as a sum of positive squares in only one way, i.e., 15468489 + 603729 = 3933^2 + 777^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16072191 and 16072200.

It is not an unprimeable number, because it can be changed into a prime (16072211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 446433 + ... + 446468.

Almost surely, 2^16072218 is an apocalyptic number.

16072218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16072218 is an abundant number, since it is smaller than the sum of its proper divisors (18750960).

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

16072218 is a wasteful number, since it uses less digits than its factorization.

16072218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892909 (or 892906 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 16072218 is about 4009.0170865188. The cubic root of 16072218 is about 252.3627617453.

Adding to 16072218 its reverse (81227061), we get a palindrome (97299279).

It can be divided in two parts, 16072 and 218, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 16072218 in words is "sixteen million, seventy-two thousand, two hundred eighteen".