1778868996 has 48 divisors (see below), whose sum is σ = 4383375360. Its totient is φ = 559919520.

The previous prime is 1778868983. The next prime is 1778869039. The reversal of 1778868996 is 6998688771.

It is a self number, because there is not a number n which added to its sum of digits gives 1778868996.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58365 + ... + 83451.

It is an arithmetic number, because the mean of its divisors is an integer number (91320320).

Almost surely, 2^1778868996 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 1778868996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2191687680).

1778868996 is an abundant number, since it is smaller than the sum of its proper divisors (2604506364).

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

1778868996 is a wasteful number, since it uses less digits than its factorization.

1778868996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25424 (or 25422 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 69.

The square root of 1778868996 is about 42176.6404067465. The cubic root of 1778868996 is about 1211.6615372470.

The spelling of 1778868996 in words is "one billion, seven hundred seventy-eight million, eight hundred sixty-eight thousand, nine hundred ninety-six".