191340 has 36 divisors (see below), whose sum is σ = 580944. Its totient is φ = 50976.

The previous prime is 191339. The next prime is 191341. The reversal of 191340 is 43191.

It is an interprime number because it is at equal distance from previous prime (191339) and next prime (191341).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×191340² = 73221991200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (191341) 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 11 ways as a sum of consecutive naturals, for example, 352 + ... + 711.

2¹⁹¹³⁴⁰ is an apocalyptic number.

191340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191340 is an abundant number, since it is smaller than the sum of its proper divisors (389604).

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

191340 is a wasteful number, since it uses less digits than its factorization.

191340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 191340 is about 437.4242791615. The cubic root of 191340 is about 57.6238038189.

It can be divided in two parts, 1913 and 40, that added together give a triangular number (1953 = T₆₂).

The spelling of 191340 in words is "one hundred ninety-one thousand, three hundred forty".