1778224894 has 8 divisors (see below), whose sum is σ = 2668183848. Its totient is φ = 888830280.

The previous prime is 1778224867. The next prime is 1778224897. The reversal of 1778224894 is 4984228771.

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

It is a super-2 number, since 2×1778224894² = 6324167547282622472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1778224897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133117 + ... + 145864.

It is an arithmetic number, because the mean of its divisors is an integer number (333522981).

Almost surely, 2^1778224894 is an apocalyptic number.

1778224894 is a deficient number, since it is larger than the sum of its proper divisors (889958954).

1778224894 is a wasteful number, since it uses less digits than its factorization.

1778224894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282170.

The product of its digits is 1806336, while the sum is 52.

The square root of 1778224894 is about 42169.0039483979. The cubic root of 1778224894 is about 1211.5152780538.

The spelling of 1778224894 in words is "one billion, seven hundred seventy-eight million, two hundred twenty-four thousand, eight hundred ninety-four".