1818394 has 8 divisors (see below), whose sum is σ = 2733588. Its totient is φ = 907200.

The previous prime is 1818379. The next prime is 1818407. The reversal of 1818394 is 4938181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1292769 + 525625 = 1137^2 + 725^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754 + ... + 2050.

2^1818394 is an apocalyptic number.

1818394 is a deficient number, since it is larger than the sum of its proper divisors (915194).

1818394 is a wasteful number, since it uses less digits than its factorization.

1818394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000.

The product of its digits is 6912, while the sum is 34.

The square root of 1818394 is about 1348.4784017551. The cubic root of 1818394 is about 122.0569920947.

The spelling of 1818394 in words is "one million, eight hundred eighteen thousand, three hundred ninety-four".