11975640 has 64 divisors (see below), whose sum is σ = 37497600. Its totient is φ = 3053952.

The previous prime is 11975609. The next prime is 11975653. The reversal of 11975640 is 4657911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591 + ... + 4929.

It is an arithmetic number, because the mean of its divisors is an integer number (585900).

Almost surely, 2^11975640 is an apocalyptic number.

11975640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11975640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18748800).

11975640 is an abundant number, since it is smaller than the sum of its proper divisors (25521960).

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

11975640 is a wasteful number, since it uses less digits than its factorization.

11975640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4376 (or 4372 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 11975640 is about 3460.5837657829. The cubic root of 11975640 is about 228.7878255703.

The spelling of 11975640 in words is "eleven million, nine hundred seventy-five thousand, six hundred forty".