11113640 has 32 divisors (see below), whose sum is σ = 25245000. Its totient is φ = 4402944.

The previous prime is 11113639. The next prime is 11113657. The reversal of 11113640 is 4631111.

It can be written as a sum of positive squares in 4 ways, for example, as 10982596 + 131044 = 3314^2 + 362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3086 + ... + 5634.

Almost surely, 2^11113640 is an apocalyptic number.

11113640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11113640 is an abundant number, since it is smaller than the sum of its proper divisors (14131360).

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

11113640 is a wasteful number, since it uses less digits than its factorization.

11113640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2665 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 11113640 is about 3333.7126450851. The cubic root of 11113640 is about 223.1612446253.

Adding to 11113640 its reverse (4631111), we get a palindrome (15744751).

The spelling of 11113640 in words is "eleven million, one hundred thirteen thousand, six hundred forty".