11615140 has 12 divisors (see below), whose sum is σ = 24391836. Its totient is φ = 4646048.

The previous prime is 11615129. The next prime is 11615141. The reversal of 11615140 is 4151611.

11615140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4096576 + 7518564 = 2024^2 + 2742^2 .

It is a super-2 number, since 2×11615140² = 269822954439200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11615141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290359 + ... + 290398.

It is an arithmetic number, because the mean of its divisors is an integer number (2032653).

Almost surely, 2^11615140 is an apocalyptic number.

11615140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11615140 is an abundant number, since it is smaller than the sum of its proper divisors (12776696).

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

11615140 is a wasteful number, since it uses less digits than its factorization.

11615140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580766 (or 580764 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 11615140 is about 3408.0991769607. The cubic root of 11615140 is about 226.4686804412.

Adding to 11615140 its reverse (4151611), we get a palindrome (15766751).

The spelling of 11615140 in words is "eleven million, six hundred fifteen thousand, one hundred forty".