1889998 has 8 divisors (see below), whose sum is σ = 3092760. Its totient is φ = 859080.

The previous prime is 1889981. The next prime is 1889999. The reversal of 1889998 is 8999881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889999) 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 3 ways as a sum of consecutive naturals, for example, 42933 + ... + 42976.

It is an arithmetic number, because the mean of its divisors is an integer number (386595).

2^1889998 is an apocalyptic number.

1889998 is a deficient number, since it is larger than the sum of its proper divisors (1202762).

1889998 is a wasteful number, since it uses less digits than its factorization.

1889998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85922.

The product of its digits is 373248, while the sum is 52.

The square root of 1889998 is about 1374.7719810936. The cubic root of 1889998 is about 123.6385153828.

The spelling of 1889998 in words is "one million, eight hundred eighty-nine thousand, nine hundred ninety-eight".