1998938 has 8 divisors (see below), whose sum is σ = 3018720. Its totient is φ = 992700.

The previous prime is 1998923. The next prime is 1998943. The reversal of 1998938 is 8398991.

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 = 1998892 and 1998901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3008 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (377340).

2^1998938 is an apocalyptic number.

1998938 is a deficient number, since it is larger than the sum of its proper divisors (1019782).

1998938 is a wasteful number, since it uses less digits than its factorization.

1998938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772.

The product of its digits is 139968, while the sum is 47.

The square root of 1998938 is about 1413.8380388149. The cubic root of 1998938 is about 125.9698004385.

The spelling of 1998938 in words is "one million, nine hundred ninety-eight thousand, nine hundred thirty-eight".