80316820 has 12 divisors (see below), whose sum is σ = 168665364. Its totient is φ = 32126720.

The previous prime is 80316799. The next prime is 80316871. The reversal of 80316820 is 2861308.

It can be written as a sum of positive squares in 2 ways, for example, as 40525956 + 39790864 = 6366^2 + 6308^2 .

It is a congruent number.

It is an unprimeable number.

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, 2007901 + ... + 2007940.

It is an arithmetic number, because the mean of its divisors is an integer number (14055447).

Almost surely, 2^80316820 is an apocalyptic number.

It is an amenable number.

80316820 is an abundant number, since it is smaller than the sum of its proper divisors (88348544).

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

80316820 is a wasteful number, since it uses less digits than its factorization.

80316820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015850 (or 4015848 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 80316820 is about 8961.9651862747. The cubic root of 80316820 is about 431.4549954473.

The spelling of 80316820 in words is "eighty million, three hundred sixteen thousand, eight hundred twenty".