16239728 has 20 divisors (see below), whose sum is σ = 31936200. Its totient is φ = 7998144.

The previous prime is 16239719. The next prime is 16239757. The reversal of 16239728 is 82793261.

It is a junction number, because it is equal to n+sod(n) for n = 16239691 and 16239700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6503 + ... + 8646.

It is an arithmetic number, because the mean of its divisors is an integer number (1596810).

Almost surely, 2^16239728 is an apocalyptic number.

It is an amenable number.

16239728 is a deficient number, since it is larger than the sum of its proper divisors (15696472).

16239728 is a wasteful number, since it uses less digits than its factorization.

16239728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15224 (or 15218 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 16239728 is about 4029.8545879473. The cubic root of 16239728 is about 253.2364695856.

The spelling of 16239728 in words is "sixteen million, two hundred thirty-nine thousand, seven hundred twenty-eight".