189509798 has 16 divisors (see below), whose sum is σ = 291595920. Its totient is φ = 92340000.

The previous prime is 189509783. The next prime is 189509807. The reversal of 189509798 is 897905981.

It is a happy number.

189509798 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6173 + ... + 20423.

It is an arithmetic number, because the mean of its divisors is an integer number (18224745).

Almost surely, 2^189509798 is an apocalyptic number.

189509798 is a deficient number, since it is larger than the sum of its proper divisors (102086122).

189509798 is a wasteful number, since it uses less digits than its factorization.

189509798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14423.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The square root of 189509798 is about 13766.2557727219. The cubic root of 189509798 is about 574.3948749261.

The spelling of 189509798 in words is "one hundred eighty-nine million, five hundred nine thousand, seven hundred ninety-eight".