11178640 has 40 divisors (see below), whose sum is σ = 28355328. Its totient is φ = 4064640.

The previous prime is 11178637. The next prime is 11178649. The reversal of 11178640 is 4687111.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 11178599 and 11178608.

It is not an unprimeable number, because it can be changed into a prime (11178649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5472 + ... + 7231.

Almost surely, 2^11178640 is an apocalyptic number.

11178640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11178640 is an abundant number, since it is smaller than the sum of its proper divisors (17176688).

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

11178640 is a wasteful number, since it uses less digits than its factorization.

11178640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12727 (or 12721 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 11178640 is about 3343.4473227494. The cubic root of 11178640 is about 223.5954645923.

The spelling of 11178640 in words is "eleven million, one hundred seventy-eight thousand, six hundred forty".