188425380 has 96 divisors (see below), whose sum is σ = 619855488. Its totient is φ = 42163200.

The previous prime is 188425351. The next prime is 188425387. The reversal of 188425380 is 83524881.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (188425387) 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 31 ways as a sum of consecutive naturals, for example, 2401 + ... + 19560.

It is an arithmetic number, because the mean of its divisors is an integer number (6456828).

Almost surely, 2^188425380 is an apocalyptic number.

188425380 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 188425380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309927744).

188425380 is an abundant number, since it is smaller than the sum of its proper divisors (431430108).

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

188425380 is a wasteful number, since it uses less digits than its factorization.

188425380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21997 (or 21995 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 188425380 is about 13726.8124486350. The cubic root of 188425380 is about 573.2971726187.

It can be divided in two parts, 188425 and 380, that added together give a triangular number (188805 = T₆₁₄).

The spelling of 188425380 in words is "one hundred eighty-eight million, four hundred twenty-five thousand, three hundred eighty".