87870222 has 48 divisors (see below), whose sum is σ = 209139840. Its totient is φ = 26442000.

The previous prime is 87870187. The next prime is 87870247. The reversal of 87870222 is 22207878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28429 + ... + 31367.

It is an arithmetic number, because the mean of its divisors is an integer number (4357080).

Almost surely, 2^87870222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87870222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104569920).

87870222 is an abundant number, since it is smaller than the sum of its proper divisors (121269618).

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

87870222 is a wasteful number, since it uses less digits than its factorization.

87870222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3106 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 87870222 is about 9373.9117768411. The cubic root of 87870222 is about 444.5772562297.

The spelling of 87870222 in words is "eighty-seven million, eight hundred seventy thousand, two hundred twenty-two".