7821180 has 36 divisors (see below), whose sum is σ = 23724792. Its totient is φ = 2085600.

The previous prime is 7821169. The next prime is 7821181. The reversal of 7821180 is 811287.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×7821180² = 122341713184800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21546 + ... + 21905.

It is an arithmetic number, because the mean of its divisors is an integer number (659022).

Almost surely, 2^7821180 is an apocalyptic number.

It is an amenable number.

7821180 is an abundant number, since it is smaller than the sum of its proper divisors (15903612).

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

7821180 is a wasteful number, since it uses less digits than its factorization.

7821180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43466 (or 43461 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 7821180 is about 2796.6372664327. The cubic root of 7821180 is about 198.4985903835.

It can be divided in two parts, 7821 and 180, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 7821180 in words is "seven million, eight hundred twenty-one thousand, one hundred eighty".