1188400 has 30 divisors (see below), whose sum is σ = 2856092. Its totient is φ = 475200.

The previous prime is 1188389. The next prime is 1188409. The reversal of 1188400 is 48811.

It is not an unprimeable number, because it can be changed into a prime (1188409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1086 + ... + 1885.

2^1188400 is an apocalyptic number.

1188400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1188400 is an abundant number, since it is smaller than the sum of its proper divisors (1667692).

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

1188400 is a wasteful number, since it uses less digits than its factorization.

1188400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2978 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1188400 is about 1090.1376059929. The cubic root of 1188400 is about 105.9223354207.

The spelling of 1188400 in words is "one million, one hundred eighty-eight thousand, four hundred".