186940 has 24 divisors (see below), whose sum is σ = 423360. Its totient is φ = 68928.

The previous prime is 186917. The next prime is 186947. The reversal of 186940 is 49681.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 186899 and 186908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100 + ... + 619.

It is an arithmetic number, because the mean of its divisors is an integer number (17640).

2¹⁸⁶⁹⁴⁰ is an apocalyptic number.

186940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

186940 is an abundant number, since it is smaller than the sum of its proper divisors (236420).

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

186940 is a wasteful number, since it uses less digits than its factorization.

186940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 186940 is about 432.3655860496. The cubic root of 186940 is about 57.1786739741.

The spelling of 186940 in words is "one hundred eighty-six thousand, nine hundred forty".