720225450 has 144 divisors (see below), whose sum is σ = 2307816576. Its totient is φ = 157449600.

The previous prime is 720225437. The next prime is 720225479. The reversal of 720225450 is 54522027.

720225450 is a `hidden beast` number, since 7 + 202 + 2 + 5 + 450 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 67480 + ... + 77420.

It is an arithmetic number, because the mean of its divisors is an integer number (16026504).

Almost surely, 2^720225450 is an apocalyptic number.

720225450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 720225450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153908288).

720225450 is an abundant number, since it is smaller than the sum of its proper divisors (1587591126).

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

720225450 is a wasteful number, since it uses less digits than its factorization.

720225450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9989 (or 9981 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 720225450 is about 26837.0164139012. The cubic root of 720225450 is about 896.3744888730.

Adding to 720225450 its reverse (54522027), we get a palindrome (774747477).

The spelling of 720225450 in words is "seven hundred twenty million, two hundred twenty-five thousand, four hundred fifty".