8173940 has 48 divisors (see below), whose sum is σ = 18824400. Its totient is φ = 2967552.

The previous prime is 8173937. The next prime is 8173943. The reversal of 8173940 is 493718.

It is an interprime number because it is at equal distance from previous prime (8173937) and next prime (8173943).

It can be written as a sum of positive squares in 8 ways, for example, as 131044 + 8042896 = 362^2 + 2836^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8173897 and 8173906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8173943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9446 + ... + 10274.

It is an arithmetic number, because the mean of its divisors is an integer number (392175).

Almost surely, 2^8173940 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 8173940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9412200).

8173940 is an abundant number, since it is smaller than the sum of its proper divisors (10650460).

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

8173940 is a wasteful number, since it uses less digits than its factorization.

8173940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 8173940 is about 2859.0103182745. The cubic root of 8173940 is about 201.4391198329.

The spelling of 8173940 in words is "eight million, one hundred seventy-three thousand, nine hundred forty".