40170 has 32 divisors (see below), whose sum is σ = 104832. Its totient is φ = 9792.

The previous prime is 40169. The next prime is 40177. The reversal of 40170 is 7104.

It is a super-2 number, since 2×40170² = 3227257800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40177) 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, 339 + ... + 441.

It is an arithmetic number, because the mean of its divisors is an integer number (3276).

2⁴⁰¹⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52416).

40170 is an abundant number, since it is smaller than the sum of its proper divisors (64662).

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

40170 is a wasteful number, since it uses less digits than its factorization.

40170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 40170 is about 200.4245493945. The cubic root of 40170 is about 34.2478997771.

Adding to 40170 its reverse (7104), we get a palindrome (47274).

It can be divided in two parts, 40 and 170, that added together give a triangular number (210 = T₂₀).

The spelling of 40170 in words is "forty thousand, one hundred seventy", and thus it is an iban number.