1393729188 has 12 divisors (see below), whose sum is σ = 3252034800. Its totient is φ = 464576392.

The previous prime is 1393729177. The next prime is 1393729189. The reversal of 1393729188 is 8819273931.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1393729188.

It is not an unprimeable number, because it can be changed into a prime (1393729189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58072038 + ... + 58072061.

It is an arithmetic number, because the mean of its divisors is an integer number (271002900).

Almost surely, 2^1393729188 is an apocalyptic number.

It is an amenable number.

1393729188 is an abundant number, since it is smaller than the sum of its proper divisors (1858305612).

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

1393729188 is a wasteful number, since it uses less digits than its factorization.

1393729188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116144106 (or 116144104 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 1393729188 is about 37332.6825717092. The cubic root of 1393729188 is about 1117.0161830185.

The spelling of 1393729188 in words is "one billion, three hundred ninety-three million, seven hundred twenty-nine thousand, one hundred eighty-eight".