189434550 has 24 divisors (see below), whose sum is σ = 469798056. Its totient is φ = 50515840.

The previous prime is 189434533. The next prime is 189434551. The reversal of 189434550 is 55434981.

189434550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 189434499 and 189434508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189434551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631299 + ... + 631598.

It is an arithmetic number, because the mean of its divisors is an integer number (19574919).

Almost surely, 2^189434550 is an apocalyptic number.

189434550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189434550 is an abundant number, since it is smaller than the sum of its proper divisors (280363506).

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

189434550 is a wasteful number, since it uses less digits than its factorization.

189434550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262912 (or 1262907 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 189434550 is about 13763.5224415845. The cubic root of 189434550 is about 574.3188405329.

The spelling of 189434550 in words is "one hundred eighty-nine million, four hundred thirty-four thousand, five hundred fifty".