189443550 has 24 divisors (see below), whose sum is σ = 469820376. Its totient is φ = 50518240.

The previous prime is 189443537. The next prime is 189443557. The reversal of 189443550 is 55344981.

It is a junction number, because it is equal to n+sod(n) for n = 189443499 and 189443508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189443557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631329 + ... + 631628.

It is an arithmetic number, because the mean of its divisors is an integer number (19575849).

Almost surely, 2^189443550 is an apocalyptic number.

189443550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189443550 is an abundant number, since it is smaller than the sum of its proper divisors (280376826).

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

189443550 is a wasteful number, since it uses less digits than its factorization.

189443550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262972 (or 1262967 counting only the distinct ones).

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

The square root of 189443550 is about 13763.8493888883. The cubic root of 189443550 is about 574.3279356491.

The spelling of 189443550 in words is "one hundred eighty-nine million, four hundred forty-three thousand, five hundred fifty".