722016720 has 320 divisors, whose sum is σ = 2664710400. Its totient is φ = 179159040.

The previous prime is 722016703. The next prime is 722016731. The reversal of 722016720 is 27610227.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2995800 + ... + 2996040.

It is an arithmetic number, because the mean of its divisors is an integer number (8327220).

Almost surely, 2^722016720 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 722016720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332355200).

722016720 is an abundant number, since it is smaller than the sum of its proper divisors (1942693680).

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

722016720 is a wasteful number, since it uses less digits than its factorization.

722016720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 722016720 is about 26870.3688102713. The cubic root of 722016720 is about 897.1169968532.

Adding to 722016720 its reverse (27610227), we get a palindrome (749626947).

The spelling of 722016720 in words is "seven hundred twenty-two million, sixteen thousand, seven hundred twenty".