830721400 has 24 divisors (see below), whose sum is σ = 1931427720. Its totient is φ = 332288480.

The previous prime is 830721379. The next prime is 830721413. The reversal of 830721400 is 4127038.

830721400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2076604 + ... + 2077003.

It is an arithmetic number, because the mean of its divisors is an integer number (80476155).

Almost surely, 2^830721400 is an apocalyptic number.

It is an amenable number.

830721400 is an abundant number, since it is smaller than the sum of its proper divisors (1100706320).

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

830721400 is a wasteful number, since it uses less digits than its factorization.

830721400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4153623 (or 4153614 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 830721400 is about 28822.2379422556. The cubic root of 830721400 is about 940.0518305509.

Adding to 830721400 its reverse (4127038), we get a palindrome (834848438).

The spelling of 830721400 in words is "eight hundred thirty million, seven hundred twenty-one thousand, four hundred".