188163140 has 48 divisors (see below), whose sum is σ = 456430464. Its totient is φ = 64396800.

The previous prime is 188163139. The next prime is 188163203. The reversal of 188163140 is 41361881.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 188163097 and 188163106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21416 + ... + 28895.

It is an arithmetic number, because the mean of its divisors is an integer number (9508968).

Almost surely, 2^188163140 is an apocalyptic number.

188163140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188163140 is an abundant number, since it is smaller than the sum of its proper divisors (268267324).

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

188163140 is a wasteful number, since it uses less digits than its factorization.

188163140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50348 (or 50346 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 188163140 is about 13717.2570144326. The cubic root of 188163140 is about 573.0310880637.

The spelling of 188163140 in words is "one hundred eighty-eight million, one hundred sixty-three thousand, one hundred forty".