193992238728 has 36 divisors (see below), whose sum is σ = 525405768615. Its totient is φ = 64662833808.

The previous prime is 193992238667. The next prime is 193992238733. The reversal of 193992238728 is 827832299391.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

193992238728 is a `hidden beast` number, since 1 + 9 + 399 + 2 + 238 + 7 + 2 + 8 = 666.

193992238728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 96996119364 + 96996119364 = 311442^2 + 311442^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=311442.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3711351 + ... + 3763257.

Almost surely, 2^193992238728 is an apocalyptic number.

193992238728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

193992238728 is an abundant number, since it is smaller than the sum of its proper divisors (331413529887).

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

193992238728 is an frugal number, since it uses more digits than its factorization.

193992238728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103826 (or 51912 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 193992238728 in words is "one hundred ninety-three billion, nine hundred ninety-two million, two hundred thirty-eight thousand, seven hundred twenty-eight".