9158220 has 72 divisors (see below), whose sum is σ = 28160496. Its totient is φ = 2408832.

The previous prime is 9158213. The next prime is 9158221. The reversal of 9158220 is 228519.

It is not an unprimeable number, because it can be changed into a prime (9158221) 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 23 ways as a sum of consecutive naturals, for example, 14634 + ... + 15246.

It is an arithmetic number, because the mean of its divisors is an integer number (391118).

Almost surely, 2^9158220 is an apocalyptic number.

9158220 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9158220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14080248).

9158220 is an abundant number, since it is smaller than the sum of its proper divisors (19002276).

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

9158220 is a wasteful number, since it uses less digits than its factorization.

9158220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 9158220 is about 3026.2551115198. The cubic root of 9158220 is about 209.2202374562.

It can be divided in two parts, 91 and 58220, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 9158220 in words is "nine million, one hundred fifty-eight thousand, two hundred twenty".