1778746368 has 176 divisors, whose sum is σ = 5460151424. Its totient is φ = 504299520.

The previous prime is 1778746301. The next prime is 1778746369. The reversal of 1778746368 is 8636478771.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1778746369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3891996 + ... + 3892452.

Almost surely, 2^1778746368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1778746368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2730075712).

1778746368 is an abundant number, since it is smaller than the sum of its proper divisors (3681405056).

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

1778746368 is a wasteful number, since it uses less digits than its factorization.

1778746368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 650 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 57.

The square root of 1778746368 is about 42175.1866385912. The cubic root of 1778746368 is about 1211.6336942663.

The spelling of 1778746368 in words is "one billion, seven hundred seventy-eight million, seven hundred forty-six thousand, three hundred sixty-eight".