189420768 has 60 divisors (see below), whose sum is σ = 557088840. Its totient is φ = 63139392.

The previous prime is 189420761. The next prime is 189420769. The reversal of 189420768 is 867024981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189420761) 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, 33948 + ... + 39131.

It is an arithmetic number, because the mean of its divisors is an integer number (9284814).

Almost surely, 2^189420768 is an apocalyptic number.

189420768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189420768 is an abundant number, since it is smaller than the sum of its proper divisors (367668072).

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

189420768 is an equidigital number, since it uses as much as digits as its factorization.

189420768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73101 (or 73084 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 189420768 is about 13763.0217612267. The cubic root of 189420768 is about 574.3049123201.

The spelling of 189420768 in words is "one hundred eighty-nine million, four hundred twenty thousand, seven hundred sixty-eight".