87209020 has 24 divisors (see below), whose sum is σ = 183355200. Its totient is φ = 34842432.

The previous prime is 87209011. The next prime is 87209027. The reversal of 87209020 is 2090278.

It is a self number, because there is not a number n which added to its sum of digits gives 87209020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87209027) 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 7 ways as a sum of consecutive naturals, for example, 19341 + ... + 23419.

It is an arithmetic number, because the mean of its divisors is an integer number (7639800).

Almost surely, 2^87209020 is an apocalyptic number.

It is an amenable number.

87209020 is an abundant number, since it is smaller than the sum of its proper divisors (96146180).

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

87209020 is a wasteful number, since it uses less digits than its factorization.

87209020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157 (or 5155 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 87209020 is about 9338.5769793904. The cubic root of 87209020 is about 443.4593356711.

Adding to 87209020 its reverse (2090278), we get a palindrome (89299298).

The spelling of 87209020 in words is "eighty-seven million, two hundred nine thousand, twenty".