189819612 has 30 divisors (see below), whose sum is σ = 496226808. Its totient is φ = 63273096.

The previous prime is 189819611. The next prime is 189819647. The reversal of 189819612 is 216918981.

189819612 is a `hidden beast` number, since 18 + 9 + 8 + 19 + 612 = 666.

189819612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189819611) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 292608 + ... + 293255.

Almost surely, 2^189819612 is an apocalyptic number.

189819612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189819612 is an abundant number, since it is smaller than the sum of its proper divisors (306407196).

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

189819612 is a wasteful number, since it uses less digits than its factorization.

189819612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585879 (or 585868 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The square root of 189819612 is about 13777.5038377785. The cubic root of 189819612 is about 574.7077148402.

The spelling of 189819612 in words is "one hundred eighty-nine million, eight hundred nineteen thousand, six hundred twelve".