11138540 has 24 divisors (see below), whose sum is σ = 26732832. Its totient is φ = 3818880.

The previous prime is 11138527. The next prime is 11138563. The reversal of 11138540 is 4583111.

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, 39641 + ... + 39920.

It is an arithmetic number, because the mean of its divisors is an integer number (1113868).

Almost surely, 2^11138540 is an apocalyptic number.

11138540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11138540 is an abundant number, since it is smaller than the sum of its proper divisors (15594292).

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

11138540 is a wasteful number, since it uses less digits than its factorization.

11138540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79577 (or 79575 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 11138540 is about 3337.4451306351. The cubic root of 11138540 is about 223.3277838278.

The spelling of 11138540 in words is "eleven million, one hundred thirty-eight thousand, five hundred forty".