11111940 has 72 divisors (see below), whose sum is σ = 38525760. Its totient is φ = 2539584.

The previous prime is 11111923. The next prime is 11111953. The reversal of 11111940 is 4911111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3150 + ... + 5669.

It is an arithmetic number, because the mean of its divisors is an integer number (535080).

Almost surely, 2^11111940 is an apocalyptic number.

11111940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111940 is an abundant number, since it is smaller than the sum of its proper divisors (27413820).

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

11111940 is a wasteful number, since it uses less digits than its factorization.

11111940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8841 (or 8836 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 11111940 is about 3333.4576643479. The cubic root of 11111940 is about 223.1498654114.

The spelling of 11111940 in words is "eleven million, one hundred eleven thousand, nine hundred forty".