816220528 has 20 divisors (see below), whose sum is σ = 1581871968. Its totient is φ = 407995520.

The previous prime is 816220501. The next prime is 816220547. The reversal of 816220528 is 825022618.

It is a junction number, because it is equal to n+sod(n) for n = 816220493 and 816220502.

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, 100425 + ... + 108247.

Almost surely, 2^816220528 is an apocalyptic number.

It is an amenable number.

816220528 is a deficient number, since it is larger than the sum of its proper divisors (765651440).

816220528 is a wasteful number, since it uses less digits than its factorization.

816220528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14352 (or 14346 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 816220528 is about 28569.5734654895. The cubic root of 816220528 is about 934.5499194049.

The spelling of 816220528 in words is "eight hundred sixteen million, two hundred twenty thousand, five hundred twenty-eight".