1898426 has 4 divisors (see below), whose sum is σ = 2847642. Its totient is φ = 949212.

The previous prime is 1898419. The next prime is 1898431. The reversal of 1898426 is 6248981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6248981 = 137 ⋅45613.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 89401 = 1345^2 + 299^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1898426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474605 + ... + 474608.

2^1898426 is an apocalyptic number.

1898426 is a deficient number, since it is larger than the sum of its proper divisors (949216).

1898426 is an equidigital number, since it uses as much as digits as its factorization.

1898426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949215.

The product of its digits is 27648, while the sum is 38.

The square root of 1898426 is about 1377.8338071045. The cubic root of 1898426 is about 123.8220218106.

The spelling of 1898426 in words is "one million, eight hundred ninety-eight thousand, four hundred twenty-six".