1438018 has 4 divisors (see below), whose sum is σ = 2157030. Its totient is φ = 719008.

The previous prime is 1438009. The next prime is 1438033. The reversal of 1438018 is 8108341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 786769 + 651249 = 887^2 + 807^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1437983 and 1438001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359503 + ... + 359506.

2^1438018 is an apocalyptic number.

1438018 is a deficient number, since it is larger than the sum of its proper divisors (719012).

1438018 is an equidigital number, since it uses as much as digits as its factorization.

1438018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719011.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1438018 is about 1199.1738823040. The cubic root of 1438018 is about 112.8724904163.

It can be divided in two parts, 14380 and 18, that multiplied together give a triangular number (258840 = T₇₁₉).

The spelling of 1438018 in words is "one million, four hundred thirty-eight thousand, eighteen".