87670220 has 48 divisors (see below), whose sum is σ = 201858048. Its totient is φ = 31719360.

The previous prime is 87670189. The next prime is 87670291. The reversal of 87670220 is 2207678.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48167 + ... + 49953.

It is an arithmetic number, because the mean of its divisors is an integer number (4205376).

Almost surely, 2^87670220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87670220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100929024).

87670220 is an abundant number, since it is smaller than the sum of its proper divisors (114187828).

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

87670220 is a wasteful number, since it uses less digits than its factorization.

87670220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 2028 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 87670220 is about 9363.2376878941. The cubic root of 87670220 is about 444.2396982385.

Adding to 87670220 its reverse (2207678), we get a palindrome (89877898).

The spelling of 87670220 in words is "eighty-seven million, six hundred seventy thousand, two hundred twenty".