820604456 has 16 divisors (see below), whose sum is σ = 1758438240. Its totient is φ = 351687600.

The previous prime is 820604437. The next prime is 820604479. The reversal of 820604456 is 654406028.

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, 7326770 + ... + 7326881.

It is an arithmetic number, because the mean of its divisors is an integer number (109902390).

Almost surely, 2^820604456 is an apocalyptic number.

It is an amenable number.

820604456 is an abundant number, since it is smaller than the sum of its proper divisors (937833784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820604456 is a wasteful number, since it uses less digits than its factorization.

820604456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14653664 (or 14653660 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 820604456 is about 28646.1944418452. The cubic root of 820604456 is about 936.2200915459.

The spelling of 820604456 in words is "eight hundred twenty million, six hundred four thousand, four hundred fifty-six".