780044820 has 96 divisors (see below), whose sum is σ = 2253772416. Its totient is φ = 201484800.

The previous prime is 780044807. The next prime is 780044821. The reversal of 780044820 is 28440087.

780044820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780044821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243630 + ... + 246810.

It is an arithmetic number, because the mean of its divisors is an integer number (23476796).

Almost surely, 2^780044820 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 780044820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126886208).

780044820 is an abundant number, since it is smaller than the sum of its proper divisors (1473727596).

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

780044820 is a wasteful number, since it uses less digits than its factorization.

780044820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321 (or 3319 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 780044820 is about 27929.2824827277. The cubic root of 780044820 is about 920.5340393436.

The spelling of 780044820 in words is "seven hundred eighty million, forty-four thousand, eight hundred twenty".