1920998 has 4 divisors (see below), whose sum is σ = 2881500. Its totient is φ = 960498.

The previous prime is 1920991. The next prime is 1921013. The reversal of 1920998 is 8990291.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480248 + ... + 480251.

It is an arithmetic number, because the mean of its divisors is an integer number (720375).

2^1920998 is an apocalyptic number.

1920998 is a deficient number, since it is larger than the sum of its proper divisors (960502).

1920998 is an equidigital number, since it uses as much as digits as its factorization.

1920998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960501.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1920998 is about 1386.0007215005. Note that the first 3 decimals coincide. The cubic root of 1920998 is about 124.3108313555.

The spelling of 1920998 in words is "one million, nine hundred twenty thousand, nine hundred ninety-eight".