1889606 has 4 divisors (see below), whose sum is σ = 2834412. Its totient is φ = 944802.

The previous prime is 1889603. The next prime is 1889617. The reversal of 1889606 is 6069881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6069881 = 281 ⋅21601.

It is a super-2 number, since 2×1889606² = 7141221670472, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1889606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472400 + ... + 472403.

It is an arithmetic number, because the mean of its divisors is an integer number (708603).

2^1889606 is an apocalyptic number.

1889606 is a deficient number, since it is larger than the sum of its proper divisors (944806).

1889606 is an equidigital number, since it uses as much as digits as its factorization.

1889606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944805.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1889606 is about 1374.6294046033. The cubic root of 1889606 is about 123.6299669347.

Subtracting from 1889606 its sum of digits (38), we obtain a 5-th power (1889568 = 18⁵).

The spelling of 1889606 in words is "one million, eight hundred eighty-nine thousand, six hundred six".