1128388423680 has 1664 divisors, whose sum is σ = 4797278668800. Its totient is φ = 249389383680.

The previous prime is 1128388423633. The next prime is 1128388423697. The reversal of 1128388423680 is 863248838211.

1128388423680 is a `hidden beast` number, since 1 + 1 + 2 + 83 + 88 + 423 + 68 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18498170850 + ... + 18498170910.

Almost surely, 2^{1128388423680} is an apocalyptic number.

1128388423680 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 1128388423680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2398639334400).

1128388423680 is an abundant number, since it is smaller than the sum of its proper divisors (3668890245120).

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

1128388423680 is an frugal number, since it uses more digits than its factorization.

1128388423680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 54.

The spelling of 1128388423680 in words is "one trillion, one hundred twenty-eight billion, three hundred eighty-eight million, four hundred twenty-three thousand, six hundred eighty".