1990218 has 16 divisors (see below), whose sum is σ = 4026240. Its totient is φ = 655776.

The previous prime is 1990211. The next prime is 1990223. The reversal of 1990218 is 8120991.

It is not an unprimeable number, because it can be changed into a prime (1990211) 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, 1330 + ... + 2397.

It is an arithmetic number, because the mean of its divisors is an integer number (251640).

2^1990218 is an apocalyptic number.

1990218 is an abundant number, since it is smaller than the sum of its proper divisors (2036022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1990218 is a wasteful number, since it uses less digits than its factorization.

1990218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1990218 is about 1410.7508639019. The cubic root of 1990218 is about 125.7863600627.

The spelling of 1990218 in words is "one million, nine hundred ninety thousand, two hundred eighteen".