1898066 has 4 divisors (see below), whose sum is σ = 2847102. Its totient is φ = 949032.

The previous prime is 1898053. The next prime is 1898069. The reversal of 1898066 is 6608981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6608981 = 23 ⋅287347.

It can be written as a sum of positive squares in only one way, i.e., 1042441 + 855625 = 1021^2 + 925^2 .

It is not an unprimeable number, because it can be changed into a prime (1898069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474515 + ... + 474518.

2^1898066 is an apocalyptic number.

1898066 is a deficient number, since it is larger than the sum of its proper divisors (949036).

1898066 is an equidigital number, since it uses as much as digits as its factorization.

1898066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949035.

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

The square root of 1898066 is about 1377.7031610619. The cubic root of 1898066 is about 123.8141944937.

Subtracting 1898066 from its reverse (6608981), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 1898066 in words is "one million, eight hundred ninety-eight thousand, sixty-six".