16443956 has 6 divisors (see below), whose sum is σ = 28776930. Its totient is φ = 8221976.

The previous prime is 16443901. The next prime is 16443971. The reversal of 16443956 is 65934461.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 6584356 = 3140^2 + 2566^2 .

It is a super-3 number, since 3×16443956³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2055491 + ... + 2055498.

It is an arithmetic number, because the mean of its divisors is an integer number (4796155).

Almost surely, 2^16443956 is an apocalyptic number.

It is an amenable number.

16443956 is a deficient number, since it is larger than the sum of its proper divisors (12332974).

16443956 is a wasteful number, since it uses less digits than its factorization.

16443956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110993 (or 4110991 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 16443956 is about 4055.1147949226. The cubic root of 16443956 is about 254.2936030761.

The spelling of 16443956 in words is "sixteen million, four hundred forty-three thousand, nine hundred fifty-six".