11500040 has 16 divisors (see below), whose sum is σ = 25875180. Its totient is φ = 4600000.

The previous prime is 11500031. The next prime is 11500043. The reversal of 11500040 is 4000511.

11500040 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 10797796 + 702244 = 3286^2 + 838^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11499994 and 11500030.

It is not an unprimeable number, because it can be changed into a prime (11500043) 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, 143711 + ... + 143790.

Almost surely, 2^11500040 is an apocalyptic number.

11500040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11500040 is an abundant number, since it is smaller than the sum of its proper divisors (14375140).

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

11500040 is a wasteful number, since it uses less digits than its factorization.

11500040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287512 (or 287508 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 11500040 is about 3391.1708892358. The cubic root of 11500040 is about 225.7181334753.

Adding to 11500040 its reverse (4000511), we get a palindrome (15500551).

The spelling of 11500040 in words is "eleven million, five hundred thousand, forty".