86820804 has 72 divisors (see below), whose sum is σ = 264031040. Its totient is φ = 23499072.

The previous prime is 86820787. The next prime is 86820817. The reversal of 86820804 is 40802868.

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

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 23 ways as a sum of consecutive naturals, for example, 4279 + ... + 13854.

Almost surely, 2^86820804 is an apocalyptic number.

86820804 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

86820804 is an abundant number, since it is smaller than the sum of its proper divisors (177210236).

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

86820804 is a wasteful number, since it uses less digits than its factorization.

86820804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18169 (or 18164 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 86820804 is about 9317.7681877153. The cubic root of 86820804 is about 442.8003285324.

The spelling of 86820804 in words is "eighty-six million, eight hundred twenty thousand, eight hundred four".