1188840 has 32 divisors (see below), whose sum is σ = 3566880. Its totient is φ = 316992.

The previous prime is 1188839. The next prime is 1188841. The reversal of 1188840 is 488811.

It is an interprime number because it is at equal distance from previous prime (1188839) and next prime (1188841).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1188798 and 1188807.

It is not an unprimeable number, because it can be changed into a prime (1188841) 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, 4834 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (111465).

2^1188840 is an apocalyptic number.

1188840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1188840 is an abundant number, since it is smaller than the sum of its proper divisors (2378040).

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

1188840 is a wasteful number, since it uses less digits than its factorization.

1188840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9921 (or 9917 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 1188840 is about 1090.3393967018. The cubic root of 1188840 is about 105.9354062377.

The spelling of 1188840 in words is "one million, one hundred eighty-eight thousand, eight hundred forty".