722475520 has 160 divisors (see below), whose sum is σ = 1976779728. Its totient is φ = 250871808.

The previous prime is 722475487. The next prime is 722475527. The reversal of 722475520 is 25574227.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 333281536 + 389193984 = 18256^2 + 19728^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-3 number, since 3×722475520³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722475527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565122 + ... + 566398.

Almost surely, 2^722475520 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 722475520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (988389864).

722475520 is an abundant number, since it is smaller than the sum of its proper divisors (1254304208).

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

722475520 is a wasteful number, since it uses less digits than its factorization.

722475520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1314 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 722475520 is about 26878.9047395909. The cubic root of 722475520 is about 897.3069786618.

The spelling of 722475520 in words is "seven hundred twenty-two million, four hundred seventy-five thousand, five hundred twenty".