1898436 has 24 divisors (see below), whose sum is σ = 4453344. Its totient is φ = 629440.

The previous prime is 1898431. The next prime is 1898447. The reversal of 1898436 is 6348981.

It is a junction number, because it is equal to n+sod(n) for n = 1898394 and 1898403.

It is not an unprimeable number, because it can be changed into a prime (1898431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3091 + ... + 3653.

It is an arithmetic number, because the mean of its divisors is an integer number (185556).

2^1898436 is an apocalyptic number.

It is an amenable number.

1898436 is an abundant number, since it is smaller than the sum of its proper divisors (2554908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1898436 is a wasteful number, since it uses less digits than its factorization.

1898436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 849 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 1898436 is about 1377.8374359844. The cubic root of 1898436 is about 123.8222392219.

The spelling of 1898436 in words is "one million, eight hundred ninety-eight thousand, four hundred thirty-six".