720900000 has 360 divisors, whose sum is σ = 2679789420. Its totient is φ = 190080000.

The previous prime is 720899989. The next prime is 720900029. The reversal of 720900000 is 9027.

It can be written as a sum of positive squares in 6 ways, for example, as 178382736 + 542517264 = 13356^2 + 23292^2 .

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 8099956 + ... + 8100044.

Almost surely, 2^720900000 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 720900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339894710).

720900000 is an abundant number, since it is smaller than the sum of its proper divisors (1958889420).

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

720900000 is an frugal number, since it uses more digits than its factorization.

720900000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 720900000 is about 26849.5810023173. The cubic root of 720900000 is about 896.6542442106.

Adding to 720900000 its reverse (9027), we get a palindrome (720909027).

The spelling of 720900000 in words is "seven hundred twenty million, nine hundred thousand".