187819968 has 56 divisors (see below), whose sum is σ = 567935872. Its totient is φ = 53662464.

The previous prime is 187819967. The next prime is 187819987. The reversal of 187819968 is 869918781.

187819968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187819963) 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, 68530 + ... + 71217.

It is an arithmetic number, because the mean of its divisors is an integer number (10141712).

Almost surely, 2^187819968 is an apocalyptic number.

It is an amenable number.

187819968 is an abundant number, since it is smaller than the sum of its proper divisors (380115904).

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

187819968 is a wasteful number, since it uses less digits than its factorization.

187819968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139769 (or 139759 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 57.

The square root of 187819968 is about 13704.7425368009. The cubic root of 187819968 is about 572.6825113005.

The spelling of 187819968 in words is "one hundred eighty-seven million, eight hundred nineteen thousand, nine hundred sixty-eight".