1889380089 has 9 divisors (see below), whose sum is σ = 2729292943. Its totient is φ = 1259499792.

The previous prime is 1889380079. The next prime is 1889380091. The reversal of 1889380089 is 9800839881.

The square root of 1889380089 is 43467.

It is a perfect power (a square), and thus also a powerful number.

1889380089 is a `hidden beast` number, since 188 + 9 + 380 + 0 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 273340089 + 1616040000 = 16533^2 + 40200^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1889380089 - 2¹¹ = 1889378041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1889380049) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 123157 + ... + 137645.

Almost surely, 2^1889380089 is an apocalyptic number.

1889380089 is the 43467-th square number.

1889380089 is the 21734-th centered octagonal number.

It is an amenable number.

1889380089 is a deficient number, since it is larger than the sum of its proper divisors (839912854).

1889380089 is an frugal number, since it uses more digits than its factorization.

1889380089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28984 (or 14492 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The cubic root of 1889380089 is about 1236.2503989655.

The spelling of 1889380089 in words is "one billion, eight hundred eighty-nine million, three hundred eighty thousand, eighty-nine".