16139388 has 12 divisors (see below), whose sum is σ = 37658600. Its totient is φ = 5379792.

The previous prime is 16139371. The next prime is 16139407. The reversal of 16139388 is 88393161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 672463 + ... + 672486.

Almost surely, 2^16139388 is an apocalyptic number.

It is an amenable number.

16139388 is an abundant number, since it is smaller than the sum of its proper divisors (21519212).

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

16139388 is a wasteful number, since it uses less digits than its factorization.

16139388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344956 (or 1344954 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 16139388 is about 4017.3857171051. The cubic root of 16139388 is about 252.7138364357.

The spelling of 16139388 in words is "sixteen million, one hundred thirty-nine thousand, three hundred eighty-eight".