820678692 has 12 divisors (see below), whose sum is σ = 1914916976. Its totient is φ = 273559560.

The previous prime is 820678687. The next prime is 820678697. The reversal of 820678692 is 296876028.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (820678687) and next prime (820678697).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (820678697) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 34194934 + ... + 34194957.

Almost surely, 2^820678692 is an apocalyptic number.

It is an amenable number.

820678692 is an abundant number, since it is smaller than the sum of its proper divisors (1094238284).

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

820678692 is a wasteful number, since it uses less digits than its factorization.

820678692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68389898 (or 68389896 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 820678692 is about 28647.4901518440. The cubic root of 820678692 is about 936.2483224183.

The spelling of 820678692 in words is "eight hundred twenty million, six hundred seventy-eight thousand, six hundred ninety-two".