189145936 has 20 divisors (see below), whose sum is σ = 418823392. Its totient is φ = 81062496.

The previous prime is 189145897. The next prime is 189145937. The reversal of 189145936 is 639541981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189145937) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 844290 + ... + 844513.

Almost surely, 2^189145936 is an apocalyptic number.

189145936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

189145936 is an abundant number, since it is smaller than the sum of its proper divisors (229677456).

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

189145936 is a wasteful number, since it uses less digits than its factorization.

189145936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688818 (or 1688812 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The square root of 189145936 is about 13753.0337016965. The cubic root of 189145936 is about 574.0270234579.

The spelling of 189145936 in words is "one hundred eighty-nine million, one hundred forty-five thousand, nine hundred thirty-six".