9161880 has 128 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 1930752.

The previous prime is 9161869. The next prime is 9161891. The reversal of 9161880 is 881619.

It is an interprime number because it is at equal distance from previous prime (9161869) and next prime (9161891).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10501 + ... + 11339.

It is an arithmetic number, because the mean of its divisors is an integer number (264600).

Almost surely, 2^9161880 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 9161880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16934400).

9161880 is an abundant number, since it is smaller than the sum of its proper divisors (24706920).

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

9161880 is a wasteful number, since it uses less digits than its factorization.

9161880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 9161880 is about 3026.8597588920. The cubic root of 9161880 is about 209.2481047377.

The spelling of 9161880 in words is "nine million, one hundred sixty-one thousand, eight hundred eighty".