721482528 has 96 divisors (see below), whose sum is σ = 2047199616. Its totient is φ = 221165568.

The previous prime is 721482521. The next prime is 721482529. The reversal of 721482528 is 825284127.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (721482521) 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 15 ways as a sum of consecutive naturals, for example, 389701 + ... + 391547.

It is an arithmetic number, because the mean of its divisors is an integer number (21324996).

Almost surely, 2^721482528 is an apocalyptic number.

721482528 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721482528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023599808).

721482528 is an abundant number, since it is smaller than the sum of its proper divisors (1325717088).

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

721482528 is a wasteful number, since it uses less digits than its factorization.

721482528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186 (or 2178 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 721482528 is about 26860.4268022681. The cubic root of 721482528 is about 896.8956949791.

The spelling of 721482528 in words is "seven hundred twenty-one million, four hundred eighty-two thousand, five hundred twenty-eight".