16539428 has 6 divisors (see below), whose sum is σ = 28944006. Its totient is φ = 8269712.

The previous prime is 16539427. The next prime is 16539433. The reversal of 16539428 is 82493561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13823524 + 2715904 = 3718^2 + 1648^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16539391 and 16539400.

It is not an unprimeable number, because it can be changed into a prime (16539427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2067425 + ... + 2067432.

It is an arithmetic number, because the mean of its divisors is an integer number (4824001).

Almost surely, 2^16539428 is an apocalyptic number.

It is an amenable number.

16539428 is a deficient number, since it is larger than the sum of its proper divisors (12404578).

16539428 is a wasteful number, since it uses less digits than its factorization.

16539428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134861 (or 4134859 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 16539428 is about 4066.8695577803. The cubic root of 16539428 is about 254.7847883028.

It can be divided in two parts, 165 and 39428, that added together give a palindrome (39593).

The spelling of 16539428 in words is "sixteen million, five hundred thirty-nine thousand, four hundred twenty-eight".