722641248 has 216 divisors, whose sum is σ = 2433294864. Its totient is φ = 199272960.

The previous prime is 722641247. The next prime is 722641259. The reversal of 722641248 is 842146227.

722641248 is a `hidden beast` number, since 7 + 2 + 2 + 641 + 2 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722641247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1937190 + ... + 1937562.

It is an arithmetic number, because the mean of its divisors is an integer number (11265254).

Almost surely, 2^722641248 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 722641248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216647432).

722641248 is an abundant number, since it is smaller than the sum of its proper divisors (1710653616).

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

722641248 is a wasteful number, since it uses less digits than its factorization.

722641248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 416 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 722641248 is about 26881.9874265278. The cubic root of 722641248 is about 897.3755842258.

The spelling of 722641248 in words is "seven hundred twenty-two million, six hundred forty-one thousand, two hundred forty-eight".