720225558 has 48 divisors (see below), whose sum is σ = 1699457760. Its totient is φ = 219111552.

The previous prime is 720225529. The next prime is 720225559. The reversal of 720225558 is 855522027.

It is a super-3 number, since 3×720225558³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720225559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3535 + ... + 38117.

It is an arithmetic number, because the mean of its divisors is an integer number (35405370).

Almost surely, 2^720225558 is an apocalyptic number.

720225558 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 720225558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849728880).

720225558 is an abundant number, since it is smaller than the sum of its proper divisors (979232202).

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

720225558 is a wasteful number, since it uses less digits than its factorization.

720225558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34693 (or 34690 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 720225558 is about 26837.0184260473. The cubic root of 720225558 is about 896.3745336777.

The spelling of 720225558 in words is "seven hundred twenty million, two hundred twenty-five thousand, five hundred fifty-eight".