1998734 has 8 divisors (see below), whose sum is σ = 3004128. Its totient is φ = 997360.

The previous prime is 1998727. The next prime is 1998739. The reversal of 1998734 is 4378991.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1998691 and 1998700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274 + ... + 2370.

It is an arithmetic number, because the mean of its divisors is an integer number (375516).

2^1998734 is an apocalyptic number.

1998734 is a deficient number, since it is larger than the sum of its proper divisors (1005394).

1998734 is a wasteful number, since it uses less digits than its factorization.

1998734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010.

The product of its digits is 54432, while the sum is 41.

The square root of 1998734 is about 1413.7658929257. The cubic root of 1998734 is about 125.9655150441.

The spelling of 1998734 in words is "one million, nine hundred ninety-eight thousand, seven hundred thirty-four".