780583128 has 128 divisors (see below), whose sum is σ = 2179457280. Its totient is φ = 231436800.

The previous prime is 780583109. The next prime is 780583151. The reversal of 780583128 is 821385087.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 780583128.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1113178 + ... + 1113878.

It is an arithmetic number, because the mean of its divisors is an integer number (17027010).

Almost surely, 2^780583128 is an apocalyptic number.

780583128 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780583128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089728640).

780583128 is an abundant number, since it is smaller than the sum of its proper divisors (1398874152).

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

780583128 is a wasteful number, since it uses less digits than its factorization.

780583128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 780583128 is about 27938.9178029501. The cubic root of 780583128 is about 920.7457437996.

The spelling of 780583128 in words is "seven hundred eighty million, five hundred eighty-three thousand, one hundred twenty-eight".