189138026 has 32 divisors (see below), whose sum is σ = 360402048. Its totient is φ = 72296640.

The previous prime is 189137987. The next prime is 189138041. The reversal of 189138026 is 620831981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3425 + ... + 19748.

It is an arithmetic number, because the mean of its divisors is an integer number (11262564).

Almost surely, 2^189138026 is an apocalyptic number.

189138026 is a deficient number, since it is larger than the sum of its proper divisors (171264022).

189138026 is a wasteful number, since it uses less digits than its factorization.

189138026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23246.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 189138026 is about 13752.7461257743. The cubic root of 189138026 is about 574.0190214937.

The spelling of 189138026 in words is "one hundred eighty-nine million, one hundred thirty-eight thousand, twenty-six".