820162770 has 64 divisors (see below), whose sum is σ = 2304481536. Its totient is φ = 182891520.

The previous prime is 820162741. The next prime is 820162787. The reversal of 820162770 is 77261028.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39019 + ... + 56238.

It is an arithmetic number, because the mean of its divisors is an integer number (36007524).

Almost surely, 2^820162770 is an apocalyptic number.

820162770 is an abundant number, since it is smaller than the sum of its proper divisors (1484318766).

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

820162770 is a wasteful number, since it uses less digits than its factorization.

820162770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95315.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 820162770 is about 28638.4840730092. The cubic root of 820162770 is about 936.0520895658.

The spelling of 820162770 in words is "eight hundred twenty million, one hundred sixty-two thousand, seven hundred seventy".