1227378734400 has 2016 divisors, whose sum is σ = 5443379601408. Its totient is φ = 239287910400.

The previous prime is 1227378734389. The next prime is 1227378734419. The reversal of 1227378734400 is 44378737221.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1227378734400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2180068519 + ... + 2180069081.

It is an arithmetic number, because the mean of its divisors is an integer number (2700089088).

Almost surely, 2^{1227378734400} is an apocalyptic number.

1227378734400 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 1227378734400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721689800704).

1227378734400 is an abundant number, since it is smaller than the sum of its proper divisors (4216000867008).

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

1227378734400 is a wasteful number, since it uses less digits than its factorization.

1227378734400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 48.

The spelling of 1227378734400 in words is "one trillion, two hundred twenty-seven billion, three hundred seventy-eight million, seven hundred thirty-four thousand, four hundred".