8154220 has 48 divisors (see below), whose sum is σ = 18779040. Its totient is φ = 2960384.

The previous prime is 8154217. The next prime is 8154221. The reversal of 8154220 is 224518.

8154220 = T₂₁₅ + T₂₁₆ + ... + T₃₈₈.

It is a junction number, because it is equal to n+sod(n) for n = 8154191 and 8154200.

It is not an unprimeable number, because it can be changed into a prime (8154221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9447 + ... + 10273.

It is an arithmetic number, because the mean of its divisors is an integer number (391230).

Almost surely, 2^8154220 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 8154220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9389520).

8154220 is an abundant number, since it is smaller than the sum of its proper divisors (10624820).

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

8154220 is a wasteful number, since it uses less digits than its factorization.

8154220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 8154220 is about 2855.5594898373. The cubic root of 8154220 is about 201.2769957228.

Adding to 8154220 its reverse (224518), we get a palindrome (8378738).

The spelling of 8154220 in words is "eight million, one hundred fifty-four thousand, two hundred twenty".