780025000 has 96 divisors (see below), whose sum is σ = 1875114360. Its totient is φ = 304000000.

The previous prime is 780024979. The next prime is 780025003. The reversal of 780025000 is 520087.

It can be written as a sum of positive squares in 12 ways, for example, as 756580036 + 23444964 = 27506^2 + 4842^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780025003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1024620 + ... + 1025380.

Almost surely, 2^780025000 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 780025000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937557180).

780025000 is an abundant number, since it is smaller than the sum of its proper divisors (1095089360).

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

780025000 is an equidigital number, since it uses as much as digits as its factorization.

780025000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 780025000 is about 27928.9276557479. The cubic root of 780025000 is about 920.5262427235.

Adding to 780025000 its reverse (520087), we get a palindrome (780545087).

The spelling of 780025000 in words is "seven hundred eighty million, twenty-five thousand".