183940 has 24 divisors (see below), whose sum is σ = 409752. Its totient is φ = 69120.

The previous prime is 183919. The next prime is 183943. The reversal of 183940 is 49381.

It can be written as a sum of positive squares in 4 ways, for example, as 30276 + 153664 = 174^2 + 392^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (183943) 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, 70 + ... + 610.

It is an arithmetic number, because the mean of its divisors is an integer number (17073).

2¹⁸³⁹⁴⁰ is an apocalyptic number.

183940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 183940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204876).

183940 is an abundant number, since it is smaller than the sum of its proper divisors (225812).

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

183940 is a wasteful number, since it uses less digits than its factorization.

183940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 183940 is about 428.8822682275. The cubic root of 183940 is about 56.8711566054.

The spelling of 183940 in words is "one hundred eighty-three thousand, nine hundred forty".