8634220 has 24 divisors (see below), whose sum is σ = 20722464. Its totient is φ = 2960256.

The previous prime is 8634211. The next prime is 8634233. The reversal of 8634220 is 224368.

It is a happy number.

It is an Ulam number.

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, 30697 + ... + 30976.

It is an arithmetic number, because the mean of its divisors is an integer number (863436).

Almost surely, 2^8634220 is an apocalyptic number.

It is an amenable number.

8634220 is an abundant number, since it is smaller than the sum of its proper divisors (12088244).

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

8634220 is a wasteful number, since it uses less digits than its factorization.

8634220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61689 (or 61687 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 8634220 is about 2938.4043288833. The cubic root of 8634220 is about 205.1513457040.

Adding to 8634220 its reverse (224368), we get a palindrome (8858588).

The spelling of 8634220 in words is "eight million, six hundred thirty-four thousand, two hundred twenty".