780878784 has 224 divisors, whose sum is σ = 2490679296. Its totient is φ = 211230720.

The previous prime is 780878783. The next prime is 780878797. The reversal of 780878784 is 487878087.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780878783) by changing a digit.

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, 2038657 + ... + 2039039.

It is an arithmetic number, because the mean of its divisors is an integer number (11119104).

Almost surely, 2^780878784 is an apocalyptic number.

780878784 is a gapful number since it is divisible by the number (74) 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 780878784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1245339648).

780878784 is an abundant number, since it is smaller than the sum of its proper divisors (1709800512).

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

780878784 is a wasteful number, since it uses less digits than its factorization.

780878784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 5619712, while the sum is 57.

The square root of 780878784 is about 27944.2084160564. The cubic root of 780878784 is about 920.8619772630.

The spelling of 780878784 in words is "seven hundred eighty million, eight hundred seventy-eight thousand, seven hundred eighty-four".