820466604 has 48 divisors (see below), whose sum is σ = 2133260640. Its totient is φ = 272701440.

The previous prime is 820466599. The next prime is 820466611. The reversal of 820466604 is 406664028.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27364 + ... + 48884.

It is an arithmetic number, because the mean of its divisors is an integer number (44442930).

Almost surely, 2^820466604 is an apocalyptic number.

It is an amenable number.

820466604 is an abundant number, since it is smaller than the sum of its proper divisors (1312794036).

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

820466604 is a wasteful number, since it uses less digits than its factorization.

820466604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21887 (or 21879 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 820466604 is about 28643.7882271183. The cubic root of 820466604 is about 936.1676639162.

The spelling of 820466604 in words is "eight hundred twenty million, four hundred sixty-six thousand, six hundred four".