188423040 has 128 divisors (see below), whose sum is σ = 646884000. Its totient is φ = 46374912.

The previous prime is 188423029. The next prime is 188423051. The reversal of 188423040 is 40324881.

It is an interprime number because it is at equal distance from previous prime (188423029) and next prime (188423051).

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 188422989 and 188423007.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21186 + ... + 28734.

Almost surely, 2^188423040 is an apocalyptic number.

188423040 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 188423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323442000).

188423040 is an abundant number, since it is smaller than the sum of its proper divisors (458460960).

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

188423040 is a wasteful number, since it uses less digits than its factorization.

188423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584 (or 7572 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 188423040 is about 13726.7272137243. The cubic root of 188423040 is about 573.2947994053.

The spelling of 188423040 in words is "one hundred eighty-eight million, four hundred twenty-three thousand, forty".