188942040 has 144 divisors (see below), whose sum is σ = 714383280. Its totient is φ = 43182720.

The previous prime is 188942027. The next prime is 188942041. The reversal of 188942040 is 40249881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 188941986 and 188942004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188942041) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12285 + ... + 22995.

It is an arithmetic number, because the mean of its divisors is an integer number (4960995).

Almost surely, 2^188942040 is an apocalyptic number.

188942040 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 188942040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357191640).

188942040 is an abundant number, since it is smaller than the sum of its proper divisors (525441240).

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

188942040 is a wasteful number, since it uses less digits than its factorization.

188942040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10742 (or 10728 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 188942040 is about 13745.6189384109. The cubic root of 188942040 is about 573.8206856111.

The spelling of 188942040 in words is "one hundred eighty-eight million, nine hundred forty-two thousand, forty".