780516396 has 72 divisors (see below), whose sum is σ = 2178356544. Its totient is φ = 233660640.

The previous prime is 780516391. The next prime is 780516397. The reversal of 780516396 is 693615087.

It is a happy number.

780516396 is a `hidden beast` number, since 7 + 8 + 0 + 5 + 1 + 639 + 6 = 666.

780516396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (780516391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20995 + ... + 44741.

It is an arithmetic number, because the mean of its divisors is an integer number (30254952).

Almost surely, 2^780516396 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 780516396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089178272).

780516396 is an abundant number, since it is smaller than the sum of its proper divisors (1397840148).

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

780516396 is a wasteful number, since it uses less digits than its factorization.

780516396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23851 (or 23846 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 780516396 is about 27937.7235293071. The cubic root of 780516396 is about 920.7195048876.

The spelling of 780516396 in words is "seven hundred eighty million, five hundred sixteen thousand, three hundred ninety-six".