1791998 has 16 divisors (see below), whose sum is σ = 2919840. Its totient is φ = 819936.

The previous prime is 1791991. The next prime is 1792013. The reversal of 1791998 is 8991971.

It is a super-2 number, since 2×1791998² = 6422513664008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1791991) 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, 3863 + ... + 4301.

It is an arithmetic number, because the mean of its divisors is an integer number (182490).

2^1791998 is an apocalyptic number.

1791998 is a deficient number, since it is larger than the sum of its proper divisors (1127842).

1791998 is a wasteful number, since it uses less digits than its factorization.

1791998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611.

The product of its digits is 40824, while the sum is 44.

The square root of 1791998 is about 1338.6552954364. The cubic root of 1791998 is about 121.4635136877.

The spelling of 1791998 in words is "one million, seven hundred ninety-one thousand, nine hundred ninety-eight".