1913218 has 8 divisors (see below), whose sum is σ = 2879100. Its totient is φ = 953520.

The previous prime is 1913213. The next prime is 1913221. The reversal of 1913218 is 8123191.

It can be written as a sum of positive squares in 2 ways, for example, as 1912689 + 529 = 1383^2 + 23^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1913192 and 1913201.

It is not an unprimeable number, because it can be changed into a prime (1913213) 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, 673 + ... + 2068.

2^1913218 is an apocalyptic number.

1913218 is a deficient number, since it is larger than the sum of its proper divisors (965882).

1913218 is a wasteful number, since it uses less digits than its factorization.

1913218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3092.

The product of its digits is 432, while the sum is 25.

The square root of 1913218 is about 1383.1912376819. The cubic root of 1913218 is about 124.1427855718.

The spelling of 1913218 in words is "one million, nine hundred thirteen thousand, two hundred eighteen".