816028 has 6 divisors (see below), whose sum is σ = 1428056. Its totient is φ = 408012.

The previous prime is 816019. The next prime is 816037. The reversal of 816028 is 820618.

It is an interprime number because it is at equal distance from previous prime (816019) and next prime (816037).

It is an Ulam number.

It is a plaindrome in base 15.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 815993 and 816011.

It is a congruent number.

It is an unprimeable number.

816028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102000 + ... + 102007.

2⁸¹⁶⁰²⁸ is an apocalyptic number.

It is an amenable number.

816028 is a deficient number, since it is larger than the sum of its proper divisors (612028).

816028 is a wasteful number, since it uses less digits than its factorization.

816028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204011 (or 204009 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 816028 is about 903.3426813784. The cubic root of 816028 is about 93.4476433882.

Subtracting from 816028 its sum of digits (25), we obtain a triangular number (816003 = T₁₂₇₇).

The spelling of 816028 in words is "eight hundred sixteen thousand, twenty-eight".