40187 has 4 divisors (see below), whose sum is σ = 45936. Its totient is φ = 34440.

The previous prime is 40177. The next prime is 40189. The reversal of 40187 is 78104.

It is a happy number.

40187 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40187 - 2⁶ = 40123 is a prime.

It is a super-2 number, since 2×40187² = 3229989938, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 40187 parts by 283 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40189) 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 3 ways as a sum of consecutive naturals, for example, 2864 + ... + 2877.

It is an arithmetic number, because the mean of its divisors is an integer number (11484).

2⁴⁰¹⁸⁷ is an apocalyptic number.

40187 is a deficient number, since it is larger than the sum of its proper divisors (5749).

40187 is an equidigital number, since it uses as much as digits as its factorization.

40187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 40187 is about 200.4669548828. The cubic root of 40187 is about 34.2527303487.

The spelling of 40187 in words is "forty thousand, one hundred eighty-seven".