8161830 has 128 divisors (see below), whose sum is σ = 24076800. Its totient is φ = 1959552.

The previous prime is 8161817. The next prime is 8161831. The reversal of 8161830 is 381618.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 8161794 and 8161803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161831) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 189789 + ... + 189831.

It is an arithmetic number, because the mean of its divisors is an integer number (188100).

Almost surely, 2^8161830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8161830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12038400).

8161830 is an abundant number, since it is smaller than the sum of its proper divisors (15914970).

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

8161830 is a wasteful number, since it uses less digits than its factorization.

8161830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8161830 is about 2856.8916675296. The cubic root of 8161830 is about 201.3395907835.

The spelling of 8161830 in words is "eight million, one hundred sixty-one thousand, eight hundred thirty".