1778111244 has 192 divisors, whose sum is σ = 5705011200. Its totient is φ = 466373376.

The previous prime is 1778111233. The next prime is 1778111267. The reversal of 1778111244 is 4421118771.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1778111199 and 1778111208.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2348514 + ... + 2349270.

It is an arithmetic number, because the mean of its divisors is an integer number (29713600).

Almost surely, 2^1778111244 is an apocalyptic number.

1778111244 is a gapful number since it is divisible by the number (14) 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 1778111244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2852505600).

1778111244 is an abundant number, since it is smaller than the sum of its proper divisors (3926899956).

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

1778111244 is a wasteful number, since it uses less digits than its factorization.

1778111244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1021 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 1778111244 is about 42167.6563731019. The cubic root of 1778111244 is about 1211.4894673618.

The spelling of 1778111244 in words is "one billion, seven hundred seventy-eight million, one hundred eleven thousand, two hundred forty-four".