1989365 has 16 divisors (see below), whose sum is σ = 2757888. Its totient is φ = 1349376.

The previous prime is 1989353. The next prime is 1989401. The reversal of 1989365 is 5639891.

It is not a de Polignac number, because 1989365 - 2¹⁰ = 1988341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3704 + ... + 4206.

It is an arithmetic number, because the mean of its divisors is an integer number (172368).

2^1989365 is an apocalyptic number.

It is an amenable number.

1989365 is a deficient number, since it is larger than the sum of its proper divisors (768523).

1989365 is a wasteful number, since it uses less digits than its factorization.

1989365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628.

The product of its digits is 58320, while the sum is 41.

The square root of 1989365 is about 1410.4485102264. The cubic root of 1989365 is about 125.7683869734.

The spelling of 1989365 in words is "one million, nine hundred eighty-nine thousand, three hundred sixty-five".