86704720 has 20 divisors (see below), whose sum is σ = 201588660. Its totient is φ = 34681856.

The previous prime is 86704699. The next prime is 86704741. The reversal of 86704720 is 2740768.

It is an interprime number because it is at equal distance from previous prime (86704699) and next prime (86704741).

It can be written as a sum of positive squares in 2 ways, for example, as 66129424 + 20575296 = 8132^2 + 4536^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541825 + ... + 541984.

It is an arithmetic number, because the mean of its divisors is an integer number (10079433).

Almost surely, 2^86704720 is an apocalyptic number.

86704720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86704720 is an abundant number, since it is smaller than the sum of its proper divisors (114883940).

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

86704720 is a wasteful number, since it uses less digits than its factorization.

86704720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083822 (or 1083816 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 86704720 is about 9311.5369300669. The cubic root of 86704720 is about 442.6028913703.

The spelling of 86704720 in words is "eighty-six million, seven hundred four thousand, seven hundred twenty".