189451688 has 16 divisors (see below), whose sum is σ = 356076000. Its totient is φ = 94498096.

The previous prime is 189451687. The next prime is 189451699. The reversal of 189451688 is 886154981.

189451688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (189451687) 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, 24908 + ... + 31611.

It is an arithmetic number, because the mean of its divisors is an integer number (22254750).

Almost surely, 2^189451688 is an apocalyptic number.

It is an amenable number.

189451688 is a deficient number, since it is larger than the sum of its proper divisors (166624312).

189451688 is a wasteful number, since it uses less digits than its factorization.

189451688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56944 (or 56940 counting only the distinct ones).

The product of its digits is 552960, while the sum is 50.

The square root of 189451688 is about 13764.1450152198. The cubic root of 189451688 is about 574.3361594073.

The spelling of 189451688 in words is "one hundred eighty-nine million, four hundred fifty-one thousand, six hundred eighty-eight".