1118538 has 12 divisors (see below), whose sum is σ = 2423538. Its totient is φ = 372840.

The previous prime is 1118527. The next prime is 1118563. The reversal of 1118538 is 8358111.

It can be written as a sum of positive squares in only one way, i.e., 762129 + 356409 = 873^2 + 597^2 .

It is a super-2 number, since 2×1118538² = 2502254514888, which contains 22 as substring.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31053 + ... + 31088.

2^1118538 is an apocalyptic number.

1118538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1118538 is an abundant number, since it is smaller than the sum of its proper divisors (1305000).

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

1118538 is a wasteful number, since it uses less digits than its factorization.

1118538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62149 (or 62146 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1118538 is about 1057.6095687918. The cubic root of 1118538 is about 103.8046752992.

It can be divided in two parts, 111 and 8538, that added together give a square (8649 = 93²).

The spelling of 1118538 in words is "one million, one hundred eighteen thousand, five hundred thirty-eight".