1188344390400 has 2160 divisors, whose sum is σ = 5034487772160. Its totient is φ = 274710528000.

The previous prime is 1188344390393. The next prime is 1188344390489. The reversal of 1188344390400 is 40934438811.

1188344390400 is a `hidden beast` number, since 1 + 1 + 8 + 83 + 443 + 90 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2160).

It is a super-2 number, since 2×1188344390400² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 7869830325 + ... + 7869830475.

It is an arithmetic number, because the mean of its divisors is an integer number (2330781376).

Almost surely, 2^{1188344390400} is an apocalyptic number.

1188344390400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1188344390400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2517243886080).

1188344390400 is an abundant number, since it is smaller than the sum of its proper divisors (3846143381760).

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

1188344390400 is a wasteful number, since it uses less digits than its factorization.

1188344390400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 1188344390400 in words is "one trillion, one hundred eighty-eight billion, three hundred forty-four million, three hundred ninety thousand, four hundred".