1778228005 has 8 divisors (see below), whose sum is σ = 2134167552. Its totient is φ = 1422386448.

The previous prime is 1778227991. The next prime is 1778228009. The reversal of 1778228005 is 5008228771.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1778228005 - 2⁷ = 1778227877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1778228009) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24252 + ... + 64378.

It is an arithmetic number, because the mean of its divisors is an integer number (266770944).

Almost surely, 2^1778228005 is an apocalyptic number.

It is an amenable number.

1778228005 is a deficient number, since it is larger than the sum of its proper divisors (355939547).

1778228005 is an equidigital number, since it uses as much as digits as its factorization.

1778228005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48995.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 1778228005 is about 42169.0408356652. The cubic root of 1778228005 is about 1211.5159845677.

The spelling of 1778228005 in words is "one billion, seven hundred seventy-eight million, two hundred twenty-eight thousand, five".