86773520 has 20 divisors (see below), whose sum is σ = 201748620. Its totient is φ = 34709376.

The previous prime is 86773517. The next prime is 86773541. The reversal of 86773520 is 2537768.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63425296 + 23348224 = 7964^2 + 4832^2 .

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

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, 542255 + ... + 542414.

It is an arithmetic number, because the mean of its divisors is an integer number (10087431).

Almost surely, 2^86773520 is an apocalyptic number.

86773520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86773520 is an abundant number, since it is smaller than the sum of its proper divisors (114975100).

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

86773520 is a wasteful number, since it uses less digits than its factorization.

86773520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084682 (or 1084676 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 86773520 is about 9315.2305392835. The cubic root of 86773520 is about 442.7199285520.

The spelling of 86773520 in words is "eighty-six million, seven hundred seventy-three thousand, five hundred twenty".