1109260638 has 48 divisors (see below), whose sum is σ = 2478425040. Its totient is φ = 358380672.

The previous prime is 1109260613. The next prime is 1109260639. The reversal of 1109260638 is 8360629011.

1109260638 is a `hidden beast` number, since 1 + 10 + 9 + 2 + 6 + 0 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109260639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72178 + ... + 86186.

It is an arithmetic number, because the mean of its divisors is an integer number (51633855).

Almost surely, 2^1109260638 is an apocalyptic number.

1109260638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1109260638 is an abundant number, since it is smaller than the sum of its proper divisors (1369164402).

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

1109260638 is a wasteful number, since it uses less digits than its factorization.

1109260638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14153 (or 14150 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1109260638 is about 33305.5646701869. The cubic root of 1109260638 is about 1035.1688641371.

Adding to 1109260638 its reverse (8360629011), we get a palindrome (9469889649).

The spelling of 1109260638 in words is "one billion, one hundred nine million, two hundred sixty thousand, six hundred thirty-eight".