189489620 has 12 divisors (see below), whose sum is σ = 397928244. Its totient is φ = 75795840.

The previous prime is 189489613. The next prime is 189489631. The reversal of 189489620 is 26984981.

189489620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117375556 + 72114064 = 10834^2 + 8492^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4737221 + ... + 4737260.

It is an arithmetic number, because the mean of its divisors is an integer number (33160687).

Almost surely, 2^189489620 is an apocalyptic number.

189489620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189489620 is an abundant number, since it is smaller than the sum of its proper divisors (208438624).

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

189489620 is a wasteful number, since it uses less digits than its factorization.

189489620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474490 (or 9474488 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 189489620 is about 13765.5228741955. The cubic root of 189489620 is about 574.3744880274.

The spelling of 189489620 in words is "one hundred eighty-nine million, four hundred eighty-nine thousand, six hundred twenty".