86621210 has 32 divisors (see below), whose sum is σ = 169480080. Its totient is φ = 31684608.

The previous prime is 86621203. The next prime is 86621219. The reversal of 86621210 is 1212668.

It can be written as a sum of positive squares in 8 ways, for example, as 31460881 + 55160329 = 5609^2 + 7427^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 86621210.

It is not an unprimeable number, because it can be changed into a prime (86621219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11114 + ... + 17226.

Almost surely, 2^86621210 is an apocalyptic number.

86621210 is a deficient number, since it is larger than the sum of its proper divisors (82858870).

86621210 is a wasteful number, since it uses less digits than its factorization.

86621210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6242.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 86621210 is about 9307.0516276638. The cubic root of 86621210 is about 442.4607474731.

Adding to 86621210 its reverse (1212668), we get a palindrome (87833878).

The spelling of 86621210 in words is "eighty-six million, six hundred twenty-one thousand, two hundred ten".