11100978 has 48 divisors (see below), whose sum is σ = 28941120. Its totient is φ = 3004128.

The previous prime is 11100953. The next prime is 11100979. The reversal of 11100978 is 87900111.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (11100979) 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 23 ways as a sum of consecutive naturals, for example, 76 + ... + 4712.

It is an arithmetic number, because the mean of its divisors is an integer number (602940).

Almost surely, 2^11100978 is an apocalyptic number.

11100978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11100978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14470560).

11100978 is an abundant number, since it is smaller than the sum of its proper divisors (17840142).

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

11100978 is a wasteful number, since it uses less digits than its factorization.

11100978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671 (or 4668 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 11100978 is about 3331.8130199638. The cubic root of 11100978 is about 223.0764616778.

The spelling of 11100978 in words is "eleven million, one hundred thousand, nine hundred seventy-eight".