188933940 has 144 divisors (see below), whose sum is σ = 621548928. Its totient is φ = 46179072.

The previous prime is 188933909. The next prime is 188933993. The reversal of 188933940 is 49339881.

188933940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 615267 + ... + 615573.

It is an arithmetic number, because the mean of its divisors is an integer number (4316312).

Almost surely, 2^188933940 is an apocalyptic number.

188933940 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 188933940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310774464).

188933940 is an abundant number, since it is smaller than the sum of its proper divisors (432614988).

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

188933940 is a wasteful number, since it uses less digits than its factorization.

188933940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 188933940 is about 13745.3242959197. The cubic root of 188933940 is about 573.8124855409.

The spelling of 188933940 in words is "one hundred eighty-eight million, nine hundred thirty-three thousand, nine hundred forty".