16139644 has 6 divisors (see below), whose sum is σ = 28244384. Its totient is φ = 8069820.

The previous prime is 16139611. The next prime is 16139671. The reversal of 16139644 is 44693161.

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, 2017452 + ... + 2017459.

Almost surely, 2^16139644 is an apocalyptic number.

It is an amenable number.

16139644 is a deficient number, since it is larger than the sum of its proper divisors (12104740).

16139644 is a wasteful number, since it uses less digits than its factorization.

16139644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034915 (or 4034913 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 16139644 is about 4017.4175784949. The cubic root of 16139644 is about 252.7151725954.

The spelling of 16139644 in words is "sixteen million, one hundred thirty-nine thousand, six hundred forty-four".