7158220 has 24 divisors (see below), whose sum is σ = 15247008. Its totient is φ = 2822960.

The previous prime is 7158199. The next prime is 7158223. The reversal of 7158220 is 228517.

It is a super-2 number, since 2×7158220² = 102480227136800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7158223) 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 7 ways as a sum of consecutive naturals, for example, 100785 + ... + 100855.

It is an arithmetic number, because the mean of its divisors is an integer number (635292).

Almost surely, 2^7158220 is an apocalyptic number.

It is an amenable number.

7158220 is an abundant number, since it is smaller than the sum of its proper divisors (8088788).

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

7158220 is an frugal number, since it uses more digits than its factorization.

7158220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 7158220 is about 2675.4850027612. The cubic root of 7158220 is about 192.7236507782.

The spelling of 7158220 in words is "seven million, one hundred fifty-eight thousand, two hundred twenty".