1778394368 has 36 divisors (see below), whose sum is σ = 3599876448. Its totient is φ = 876664320.

The previous prime is 1778394341. The next prime is 1778394377. The reversal of 1778394368 is 8634938771.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30746 + ... + 67097.

It is an arithmetic number, because the mean of its divisors is an integer number (99996568).

Almost surely, 2^1778394368 is an apocalyptic number.

It is an amenable number.

1778394368 is an abundant number, since it is smaller than the sum of its proper divisors (1821482080).

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

1778394368 is an frugal number, since it uses more digits than its factorization.

1778394368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97930 (or 97916 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 56.

The square root of 1778394368 is about 42171.0133622610. The cubic root of 1778394368 is about 1211.5537647151.

The spelling of 1778394368 in words is "one billion, seven hundred seventy-eight million, three hundred ninety-four thousand, three hundred sixty-eight".