1780116828 has 48 divisors (see below), whose sum is σ = 4813853184. Its totient is φ = 501439680.

The previous prime is 1780116817. The next prime is 1780116841. The reversal of 1780116828 is 8286110871.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1780116828.

It is a congruent number.

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, 143275 + ... + 155202.

It is an arithmetic number, because the mean of its divisors is an integer number (100288608).

Almost surely, 2^1780116828 is an apocalyptic number.

It is an amenable number.

1780116828 is an abundant number, since it is smaller than the sum of its proper divisors (3033736356).

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

1780116828 is a wasteful number, since it uses less digits than its factorization.

1780116828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298562 (or 298560 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 42.

The square root of 1780116828 is about 42191.4307413247. The cubic root of 1780116828 is about 1211.9447877560.

The spelling of 1780116828 in words is "one billion, seven hundred eighty million, one hundred sixteen thousand, eight hundred twenty-eight".