1990118 has 8 divisors (see below), whose sum is σ = 3214848. Its totient is φ = 918504.

The previous prime is 1990111. The next prime is 1990123. The reversal of 1990118 is 8110991.

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

It is a super-4 number, since 4×1990118⁴ (a number of 26 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990111) 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, 38246 + ... + 38297.

It is an arithmetic number, because the mean of its divisors is an integer number (401856).

2^1990118 is an apocalyptic number.

1990118 is a deficient number, since it is larger than the sum of its proper divisors (1224730).

1990118 is a wasteful number, since it uses less digits than its factorization.

1990118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76558.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1990118 is about 1410.7154213377. The cubic root of 1990118 is about 125.7842532840.

The spelling of 1990118 in words is "one million, nine hundred ninety thousand, one hundred eighteen".