16540028 has 24 divisors (see below), whose sum is σ = 29998080. Its totient is φ = 7974720.

The previous prime is 16540021. The next prime is 16540033. The reversal of 16540028 is 82004561.

It is a junction number, because it is equal to n+sod(n) for n = 16539979 and 16540006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12293 + ... + 13571.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^16540028 is an apocalyptic number.

It is an amenable number.

16540028 is a deficient number, since it is larger than the sum of its proper divisors (13458052).

16540028 is a wasteful number, since it uses less digits than its factorization.

16540028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 16540028 is about 4066.9433239228. The cubic root of 16540028 is about 254.7878692039.

Adding to 16540028 its reverse (82004561), we get a palindrome (98544589).

The spelling of 16540028 in words is "sixteen million, five hundred forty thousand, twenty-eight".