188445648 has 80 divisors (see below), whose sum is σ = 516792320. Its totient is φ = 59004288.

The previous prime is 188445641. The next prime is 188445659. The reversal of 188445648 is 846544881.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 188445597 and 188445606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188445641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115011 + ... + 116637.

It is an arithmetic number, because the mean of its divisors is an integer number (6459904).

Almost surely, 2^188445648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188445648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258396160).

188445648 is an abundant number, since it is smaller than the sum of its proper divisors (328346672).

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

188445648 is a wasteful number, since it uses less digits than its factorization.

188445648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 1778 counting only the distinct ones).

The product of its digits is 983040, while the sum is 48.

The square root of 188445648 is about 13727.5506919479. The cubic root of 188445648 is about 573.3177274762.

The spelling of 188445648 in words is "one hundred eighty-eight million, four hundred forty-five thousand, six hundred forty-eight".