187728635772 has 24 divisors (see below), whose sum is σ = 486703870800. Its totient is φ = 62576211888.

The previous prime is 187728635753. The next prime is 187728635789. The reversal of 187728635772 is 277536827781.

187728635772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869113947 + ... + 869114162.

It is an arithmetic number, because the mean of its divisors is an integer number (20279327950).

Almost surely, 2^187728635772 is an apocalyptic number.

187728635772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

187728635772 is an abundant number, since it is smaller than the sum of its proper divisors (298975235028).

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

187728635772 is a wasteful number, since it uses less digits than its factorization.

187728635772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738228122 (or 1738228114 counting only the distinct ones).

The product of its digits is 55319040, while the sum is 63.

The spelling of 187728635772 in words is "one hundred eighty-seven billion, seven hundred twenty-eight million, six hundred thirty-five thousand, seven hundred seventy-two".