16443040 has 24 divisors (see below), whose sum is σ = 38847060. Its totient is φ = 6577152.

The previous prime is 16443013. The next prime is 16443041. The reversal of 16443040 is 4034461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16418704 + 24336 = 4052^2 + 156^2 .

It is a super-3 number, since 3×16443040³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16443041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51225 + ... + 51544.

Almost surely, 2^16443040 is an apocalyptic number.

16443040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16443040 is an abundant number, since it is smaller than the sum of its proper divisors (22404020).

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

16443040 is a wasteful number, since it uses less digits than its factorization.

16443040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102784 (or 102776 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 16443040 is about 4055.0018495680. The cubic root of 16443040 is about 254.2888812346.

The spelling of 16443040 in words is "sixteen million, four hundred forty-three thousand, forty".