16139936 has 24 divisors (see below), whose sum is σ = 33645780. Its totient is φ = 7595008.

The previous prime is 16139923. The next prime is 16139939. The reversal of 16139936 is 63993161.

It can be written as a sum of positive squares in 2 ways, for example, as 15649936 + 490000 = 3956^2 + 700^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16139936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16139939) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 14291 + ... + 15378.

Almost surely, 2^16139936 is an apocalyptic number.

16139936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16139936 is an abundant number, since it is smaller than the sum of its proper divisors (17505844).

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

16139936 is a wasteful number, since it uses less digits than its factorization.

16139936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29696 (or 29688 counting only the distinct ones).

The product of its digits is 26244, while the sum is 38.

The square root of 16139936 is about 4017.4539200842. The cubic root of 16139936 is about 252.7166966353.

The spelling of 16139936 in words is "sixteen million, one hundred thirty-nine thousand, nine hundred thirty-six".