7931980 has 48 divisors (see below), whose sum is σ = 19414080. Its totient is φ = 2665728.

The previous prime is 7931977. The next prime is 7932011. The reversal of 7931980 is 891397.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6886 + ... + 7954.

It is an arithmetic number, because the mean of its divisors is an integer number (404460).

Almost surely, 2^7931980 is an apocalyptic number.

7931980 is a gapful number since it is divisible by the number (70) 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 7931980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9707040).

7931980 is an abundant number, since it is smaller than the sum of its proper divisors (11482100).

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

7931980 is a wasteful number, since it uses less digits than its factorization.

7931980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 7931980 is about 2816.3771054317. The cubic root of 7931980 is about 199.4315525348.

It can be divided in two parts, 7931 and 980, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 7931980 in words is "seven million, nine hundred thirty-one thousand, nine hundred eighty".