780994440 has 192 divisors, whose sum is σ = 2723414400. Its totient is φ = 199064448.

The previous prime is 780994421. The next prime is 780994453. The reversal of 780994440 is 44499087.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 570637 + ... + 572003.

It is an arithmetic number, because the mean of its divisors is an integer number (14184450).

Almost surely, 2^780994440 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 780994440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1361707200).

780994440 is an abundant number, since it is smaller than the sum of its proper divisors (1942419960).

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

780994440 is a wasteful number, since it uses less digits than its factorization.

780994440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 780994440 is about 27946.2777485661. The cubic root of 780994440 is about 920.9074379915.

The spelling of 780994440 in words is "seven hundred eighty million, nine hundred ninety-four thousand, four hundred forty".