86220520 has 16 divisors (see below), whose sum is σ = 193996260. Its totient is φ = 34488192.

The previous prime is 86220503. The next prime is 86220523. The reversal of 86220520 is 2502268.

It can be written as a sum of positive squares in 2 ways, for example, as 86007076 + 213444 = 9274^2 + 462^2 .

It is not an unprimeable number, because it can be changed into a prime (86220523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077717 + ... + 1077796.

Almost surely, 2^86220520 is an apocalyptic number.

It is an amenable number.

86220520 is an abundant number, since it is smaller than the sum of its proper divisors (107775740).

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

86220520 is a wasteful number, since it uses less digits than its factorization.

86220520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155524 (or 2155520 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 86220520 is about 9285.5005250121. The cubic root of 86220520 is about 441.7774518972. Note that the first 3 decimals are identical.

Adding to 86220520 its reverse (2502268), we get a palindrome (88722788).

The spelling of 86220520 in words is "eighty-six million, two hundred twenty thousand, five hundred twenty".