1900218 has 8 divisors (see below), whose sum is σ = 3800448. Its totient is φ = 633404.

The previous prime is 1900201. The next prime is 1900219. The reversal of 1900218 is 8120091.

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

1900218 is an admirable number.

It is a super-2 number, since 2×1900218² = 7221656895048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1900194 and 1900203.

It is not an unprimeable number, because it can be changed into a prime (1900219) 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, 158346 + ... + 158357.

It is an arithmetic number, because the mean of its divisors is an integer number (475056).

2^1900218 is an apocalyptic number.

1900218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1900218 is a wasteful number, since it uses less digits than its factorization.

1900218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316708.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1900218 is about 1378.4839498522. The cubic root of 1900218 is about 123.8609697395.

The spelling of 1900218 in words is "one million, nine hundred thousand, two hundred eighteen".