16443816 has 32 divisors (see below), whose sum is σ = 43274400. Its totient is φ = 5192640.

The previous prime is 16443769. The next prime is 16443821. The reversal of 16443816 is 61834461.

It is a super-3 number, since 3×16443816³ (a number of 23 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17575 + ... + 18486.

It is an arithmetic number, because the mean of its divisors is an integer number (1352325).

Almost surely, 2^16443816 is an apocalyptic number.

It is an amenable number.

16443816 is an abundant number, since it is smaller than the sum of its proper divisors (26830584).

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

16443816 is a wasteful number, since it uses less digits than its factorization.

16443816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36089 (or 36085 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 16443816 is about 4055.0975327358. The cubic root of 16443816 is about 254.2928814087.

It can be divided in two parts, 1644 and 3816, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 16443816 in words is "sixteen million, four hundred forty-three thousand, eight hundred sixteen".