188085378 has 16 divisors (see below), whose sum is σ = 405107136. Its totient is φ = 57872400.

The previous prime is 188085371. The next prime is 188085379. The reversal of 188085378 is 873580881.

188085378 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×188085378² = 70752218834805768, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (188085371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205598 + ... + 1205753.

It is an arithmetic number, because the mean of its divisors is an integer number (25319196).

Almost surely, 2^188085378 is an apocalyptic number.

188085378 is an abundant number, since it is smaller than the sum of its proper divisors (217021758).

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

188085378 is a wasteful number, since it uses less digits than its factorization.

188085378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411369.

The product of its (nonzero) digits is 430080, while the sum is 48.

The square root of 188085378 is about 13714.4222627131. The cubic root of 188085378 is about 572.9521385179.

The spelling of 188085378 in words is "one hundred eighty-eight million, eighty-five thousand, three hundred seventy-eight".