1118920 has 32 divisors (see below), whose sum is σ = 2747520. Its totient is φ = 406720.

The previous prime is 1118911. The next prime is 1118921. The reversal of 1118920 is 298111.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1118891 and 1118900.

It is not an unprimeable number, because it can be changed into a prime (1118921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832 + ... + 1711.

It is an arithmetic number, because the mean of its divisors is an integer number (85860).

2^1118920 is an apocalyptic number.

1118920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1118920 is an abundant number, since it is smaller than the sum of its proper divisors (1628600).

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

1118920 is a wasteful number, since it uses less digits than its factorization.

1118920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565 (or 2561 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1118920 is about 1057.7901493207. The cubic root of 1118920 is about 103.8164909827.

The spelling of 1118920 in words is "one million, one hundred eighteen thousand, nine hundred twenty".