1838818 has 4 divisors (see below), whose sum is σ = 2758230. Its totient is φ = 919408.

The previous prime is 1838813. The next prime is 1838819. The reversal of 1838818 is 8188381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8188381 = 701 ⋅11681.

It can be written as a sum of positive squares in only one way, i.e., 1734489 + 104329 = 1317^2 + 323^2 .

It is not an unprimeable number, because it can be changed into a prime (1838813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459703 + ... + 459706.

2^1838818 is an apocalyptic number.

1838818 is a deficient number, since it is larger than the sum of its proper divisors (919412).

1838818 is an equidigital number, since it uses as much as digits as its factorization.

1838818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919411.

The product of its digits is 12288, while the sum is 37.

The square root of 1838818 is about 1356.0302356511. The cubic root of 1838818 is about 122.5122686588.

The spelling of 1838818 in words is "one million, eight hundred thirty-eight thousand, eight hundred eighteen".