87753220 has 12 divisors (see below), whose sum is σ = 184281804. Its totient is φ = 35101280.

The previous prime is 87753203. The next prime is 87753221. The reversal of 87753220 is 2235778.

It can be written as a sum of positive squares in 2 ways, for example, as 20775364 + 66977856 = 4558^2 + 8184^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87753221) 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, 2193811 + ... + 2193850.

It is an arithmetic number, because the mean of its divisors is an integer number (15356817).

Almost surely, 2^87753220 is an apocalyptic number.

It is an amenable number.

87753220 is an abundant number, since it is smaller than the sum of its proper divisors (96528584).

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

87753220 is a wasteful number, since it uses less digits than its factorization.

87753220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387670 (or 4387668 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 87753220 is about 9367.6688669060. The cubic root of 87753220 is about 444.3798456575.

Adding to 87753220 its reverse (2235778), we get a palindrome (89988998).

The spelling of 87753220 in words is "eighty-seven million, seven hundred fifty-three thousand, two hundred twenty".