1998419 has 8 divisors (see below), whose sum is σ = 2086560. Its totient is φ = 1911616.

The previous prime is 1998413. The next prime is 1998427. The reversal of 1998419 is 9148991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1998419 is a prime.

It is a super-2 number, since 2×1998419² = 7987356999122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1998413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3722 + ... + 4224.

It is an arithmetic number, because the mean of its divisors is an integer number (260820).

2^1998419 is an apocalyptic number.

1998419 is a deficient number, since it is larger than the sum of its proper divisors (88141).

1998419 is a wasteful number, since it uses less digits than its factorization.

1998419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its digits is 23328, while the sum is 41.

The square root of 1998419 is about 1413.6544839529. The cubic root of 1998419 is about 125.9588973181.

The spelling of 1998419 in words is "one million, nine hundred ninety-eight thousand, four hundred nineteen".