87750220 has 24 divisors (see below), whose sum is σ = 184464000. Its totient is φ = 35064192.

The previous prime is 87750217. The next prime is 87750239. The reversal of 87750220 is 2205778.

It is a super-2 number, since 2×87750220² = 15400202220096800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27256 + ... + 30304.

It is an arithmetic number, because the mean of its divisors is an integer number (7686000).

Almost surely, 2^87750220 is an apocalyptic number.

It is an amenable number.

87750220 is an abundant number, since it is smaller than the sum of its proper divisors (96713780).

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

87750220 is a wasteful number, since it uses less digits than its factorization.

87750220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4497 (or 4495 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 87750220 is about 9367.5087403215. The cubic root of 87750220 is about 444.3747816278.

Adding to 87750220 its reverse (2205778), we get a palindrome (89955998).

The spelling of 87750220 in words is "eighty-seven million, seven hundred fifty thousand, two hundred twenty".