11500640 has 24 divisors (see below), whose sum is σ = 27170640. Its totient is φ = 4600192.

The previous prime is 11500637. The next prime is 11500649. The reversal of 11500640 is 4600511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11500649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35780 + ... + 36099.

It is an arithmetic number, because the mean of its divisors is an integer number (1132110).

Almost surely, 2^11500640 is an apocalyptic number.

11500640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11500640 is an abundant number, since it is smaller than the sum of its proper divisors (15670000).

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

11500640 is an equidigital number, since it uses as much as digits as its factorization.

11500640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71894 (or 71886 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 11500640 is about 3391.2593531017. The cubic root of 11500640 is about 225.7220589261.

The spelling of 11500640 in words is "eleven million, five hundred thousand, six hundred forty".