188396340 has 96 divisors (see below), whose sum is σ = 580124160. Its totient is φ = 45302400.

The previous prime is 188396323. The next prime is 188396387. The reversal of 188396340 is 43693881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 188396292 and 188396301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85371 + ... + 87549.

It is an arithmetic number, because the mean of its divisors is an integer number (6042960).

Almost surely, 2^188396340 is an apocalyptic number.

188396340 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 188396340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290062080).

188396340 is an abundant number, since it is smaller than the sum of its proper divisors (391727820).

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

188396340 is a wasteful number, since it uses less digits than its factorization.

188396340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 188396340 is about 13725.7546240635. The cubic root of 188396340 is about 573.2677190400.

The spelling of 188396340 in words is "one hundred eighty-eight million, three hundred ninety-six thousand, three hundred forty".