188825440 has 24 divisors (see below), whose sum is σ = 446100480. Its totient is φ = 75530112.

The previous prime is 188825437. The next prime is 188825449. The reversal of 188825440 is 44528881.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 188825393 and 188825402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188825449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589920 + ... + 590239.

It is an arithmetic number, because the mean of its divisors is an integer number (18587520).

Almost surely, 2^188825440 is an apocalyptic number.

188825440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188825440 is an abundant number, since it is smaller than the sum of its proper divisors (257275040).

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

188825440 is a wasteful number, since it uses less digits than its factorization.

188825440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180174 (or 1180166 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 40.

The square root of 188825440 is about 13741.3769324620. The cubic root of 188825440 is about 573.7026224915.

The spelling of 188825440 in words is "one hundred eighty-eight million, eight hundred twenty-five thousand, four hundred forty".