11640340 has 12 divisors (see below), whose sum is σ = 24444756. Its totient is φ = 4656128.

The previous prime is 11640329. The next prime is 11640347. The reversal of 11640340 is 4304611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3090564 + 8549776 = 1758^2 + 2924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290989 + ... + 291028.

It is an arithmetic number, because the mean of its divisors is an integer number (2037063).

Almost surely, 2^11640340 is an apocalyptic number.

11640340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11640340 is an abundant number, since it is smaller than the sum of its proper divisors (12804416).

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

11640340 is a wasteful number, since it uses less digits than its factorization.

11640340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582026 (or 582024 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 11640340 is about 3411.7942493650. The cubic root of 11640340 is about 226.6323429380.

Adding to 11640340 its reverse (4304611), we get a palindrome (15944951).

The spelling of 11640340 in words is "eleven million, six hundred forty thousand, three hundred forty".