720290816 has 176 divisors, whose sum is σ = 1825203456. Its totient is φ = 276824064.

The previous prime is 720290773. The next prime is 720290843. The reversal of 720290816 is 618092027.

It is a happy number.

It is a super-2 number, since 2×720290816² = 1037637719227891712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2802560 + ... + 2802816.

Almost surely, 2^720290816 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 720290816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912601728).

720290816 is an abundant number, since it is smaller than the sum of its proper divisors (1104912640).

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

720290816 is a wasteful number, since it uses less digits than its factorization.

720290816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 720290816 is about 26838.2342191136. The cubic root of 720290816 is about 896.4016056794.

The spelling of 720290816 in words is "seven hundred twenty million, two hundred ninety thousand, eight hundred sixteen".