7820180 has 12 divisors (see below), whose sum is σ = 16422420. Its totient is φ = 3128064.

The previous prime is 7820171. The next prime is 7820231. The reversal of 7820180 is 810287.

It can be written as a sum of positive squares in 2 ways, for example, as 2079364 + 5740816 = 1442^2 + 2396^2 .

It is a super-2 number, since 2×7820180² = 122310430464800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 195485 + ... + 195524.

It is an arithmetic number, because the mean of its divisors is an integer number (1368535).

Almost surely, 2^7820180 is an apocalyptic number.

It is an amenable number.

7820180 is an abundant number, since it is smaller than the sum of its proper divisors (8602240).

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

7820180 is a wasteful number, since it uses less digits than its factorization.

7820180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391018 (or 391016 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 7820180 is about 2796.4584745710. The cubic root of 7820180 is about 198.4901301490.

It can be divided in two parts, 7820 and 180, that added together give a cube (8000 = 20³).

The spelling of 7820180 in words is "seven million, eight hundred twenty thousand, one hundred eighty".