1989662 has 4 divisors (see below), whose sum is σ = 2984496. Its totient is φ = 994830.

The previous prime is 1989643. The next prime is 1989671. The reversal of 1989662 is 2669891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2669891 = 7 ⋅381413.

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, 497414 + ... + 497417.

It is an arithmetic number, because the mean of its divisors is an integer number (746124).

2^1989662 is an apocalyptic number.

1989662 is a deficient number, since it is larger than the sum of its proper divisors (994834).

1989662 is an equidigital number, since it uses as much as digits as its factorization.

1989662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994833.

The product of its digits is 46656, while the sum is 41.

The square root of 1989662 is about 1410.5537919555. The cubic root of 1989662 is about 125.7746454784.

The spelling of 1989662 in words is "one million, nine hundred eighty-nine thousand, six hundred sixty-two".