189840612 has 72 divisors (see below), whose sum is σ = 494393536. Its totient is φ = 56359296.

The previous prime is 189840611. The next prime is 189840631. The reversal of 189840612 is 216048981.

189840612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (189840611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130473 + ... + 131919.

Almost surely, 2^189840612 is an apocalyptic number.

189840612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189840612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247196768).

189840612 is an abundant number, since it is smaller than the sum of its proper divisors (304552924).

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

189840612 is a wasteful number, since it uses less digits than its factorization.

189840612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 189840612 is about 13778.2659286283. The cubic root of 189840612 is about 574.7289076222.

The spelling of 189840612 in words is "one hundred eighty-nine million, eight hundred forty thousand, six hundred twelve".