188465940 has 288 divisors, whose sum is σ = 676341120. Its totient is φ = 43670016.

The previous prime is 188465929. The next prime is 188465987. The reversal of 188465940 is 49564881.

188465940 is a `hidden beast` number, since 18 + 8 + 46 + 594 + 0 = 666.

188465940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1200342 + ... + 1200498.

Almost surely, 2^188465940 is an apocalyptic number.

188465940 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 188465940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338170560).

188465940 is an abundant number, since it is smaller than the sum of its proper divisors (487875180).

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

188465940 is a wasteful number, since it uses less digits than its factorization.

188465940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 188465940 is about 13728.2897696691. The cubic root of 188465940 is about 573.3383051970.

The spelling of 188465940 in words is "one hundred eighty-eight million, four hundred sixty-five thousand, nine hundred forty".