1989622 has 4 divisors (see below), whose sum is σ = 2984436. Its totient is φ = 994810.

The previous prime is 1989619. The next prime is 1989643. The reversal of 1989622 is 2269891.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497404 + ... + 497407.

It is an arithmetic number, because the mean of its divisors is an integer number (746109).

2^1989622 is an apocalyptic number.

1989622 is a deficient number, since it is larger than the sum of its proper divisors (994814).

1989622 is an equidigital number, since it uses as much as digits as its factorization.

1989622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994813.

The product of its digits is 15552, while the sum is 37.

The square root of 1989622 is about 1410.5396130559. The cubic root of 1989622 is about 125.7738026184.

The spelling of 1989622 in words is "one million, nine hundred eighty-nine thousand, six hundred twenty-two".