87134220 has 36 divisors (see below), whose sum is σ = 264307680. Its totient is φ = 23235744.

The previous prime is 87134219. The next prime is 87134221. The reversal of 87134220 is 2243178.

It is an interprime number because it is at equal distance from previous prime (87134219) and next prime (87134221).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (87134221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241860 + ... + 242219.

It is an arithmetic number, because the mean of its divisors is an integer number (7341880).

Almost surely, 2^87134220 is an apocalyptic number.

It is an amenable number.

87134220 is an abundant number, since it is smaller than the sum of its proper divisors (177173460).

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

87134220 is a wasteful number, since it uses less digits than its factorization.

87134220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484094 (or 484089 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 87134220 is about 9334.5712274319. The cubic root of 87134220 is about 443.3325129852.

Adding to 87134220 its reverse (2243178), we get a palindrome (89377398).

The spelling of 87134220 in words is "eighty-seven million, one hundred thirty-four thousand, two hundred twenty".