8169980 has 72 divisors (see below), whose sum is σ = 21436128. Its totient is φ = 2547072.

The previous prime is 8169971. The next prime is 8169983. The reversal of 8169980 is 899618.

8169980 = 18² + 19² + ... + 290².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8169983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121907 + ... + 121973.

It is an arithmetic number, because the mean of its divisors is an integer number (297724).

Almost surely, 2^8169980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8169980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10718064).

8169980 is an abundant number, since it is smaller than the sum of its proper divisors (13266148).

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

8169980 is a wasteful number, since it uses less digits than its factorization.

8169980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 8169980 is about 2858.3176870320. The cubic root of 8169980 is about 201.4065844107.

It can be divided in two parts, 81699 and 80, that multiplied together give a triangular number (6535920 = T₃₆₁₅).

The spelling of 8169980 in words is "eight million, one hundred sixty-nine thousand, nine hundred eighty".