188214840 has 160 divisors (see below), whose sum is σ = 690251760. Its totient is φ = 45619200.

The previous prime is 188214839. The next prime is 188214853. The reversal of 188214840 is 48412881.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 188214795 and 188214804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33000 + ... + 38280.

Almost surely, 2^188214840 is an apocalyptic number.

188214840 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 188214840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345125880).

188214840 is an abundant number, since it is smaller than the sum of its proper divisors (502036920).

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

188214840 is a wasteful number, since it uses less digits than its factorization.

188214840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5315 (or 5302 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 188214840 is about 13719.1413725495. The cubic root of 188214840 is about 573.0835655651.

The spelling of 188214840 in words is "one hundred eighty-eight million, two hundred fourteen thousand, eight hundred forty".