13443988 has 6 divisors (see below), whose sum is σ = 23526986. Its totient is φ = 6721992.

The previous prime is 13443979. The next prime is 13444007. The reversal of 13443988 is 88934431.

It can be written as a sum of positive squares in only one way, i.e., 12194064 + 1249924 = 3492^2 + 1118^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13443988.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1680495 + ... + 1680502.

Almost surely, 2^13443988 is an apocalyptic number.

It is an amenable number.

13443988 is a deficient number, since it is larger than the sum of its proper divisors (10082998).

13443988 is a wasteful number, since it uses less digits than its factorization.

13443988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361001 (or 3360999 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 13443988 is about 3666.6044237141. The cubic root of 13443988 is about 237.7803920158.

The spelling of 13443988 in words is "thirteen million, four hundred forty-three thousand, nine hundred eighty-eight".