11147640 has 128 divisors (see below), whose sum is σ = 39951360. Its totient is φ = 2433024.

The previous prime is 11147603. The next prime is 11147641. The reversal of 11147640 is 4674111.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11147640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11147641) 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 31 ways as a sum of consecutive naturals, for example, 19032 + ... + 19608.

It is an arithmetic number, because the mean of its divisors is an integer number (312120).

Almost surely, 2^11147640 is an apocalyptic number.

11147640 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 11147640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19975680).

11147640 is an abundant number, since it is smaller than the sum of its proper divisors (28803720).

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

11147640 is a wasteful number, since it uses less digits than its factorization.

11147640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 11147640 is about 3338.8081705902. The cubic root of 11147640 is about 223.3885856216.

The spelling of 11147640 in words is "eleven million, one hundred forty-seven thousand, six hundred forty".