722731968 has 252 divisors, whose sum is σ = 2495717640. Its totient is φ = 199148544.

The previous prime is 722731951. The next prime is 722732081. The reversal of 722731968 is 869137227.

It is a tau number, because it is divible by the number of its divisors (252).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 818055 + ... + 818937.

Almost surely, 2^722731968 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 722731968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1247858820).

722731968 is an abundant number, since it is smaller than the sum of its proper divisors (1772985672).

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

722731968 is a wasteful number, since it uses less digits than its factorization.

722731968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 924 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 722731968 is about 26883.6747488136. The cubic root of 722731968 is about 897.4131346732.

The spelling of 722731968 in words is "seven hundred twenty-two million, seven hundred thirty-one thousand, nine hundred sixty-eight".