721482540 has 48 divisors (see below), whose sum is σ = 2021967360. Its totient is φ = 192222400.

The previous prime is 721482539. The next prime is 721482547. The reversal of 721482540 is 45284127.

It is not an unprimeable number, because it can be changed into a prime (721482547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70765 + ... + 80315.

It is an arithmetic number, because the mean of its divisors is an integer number (42124320).

Almost surely, 2^721482540 is an apocalyptic number.

It is an amenable number.

721482540 is an abundant number, since it is smaller than the sum of its proper divisors (1300484820).

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

721482540 is a wasteful number, since it uses less digits than its factorization.

721482540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822 (or 10820 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 721482540 is about 26860.4270256450. The cubic root of 721482540 is about 896.8956999516.

The spelling of 721482540 in words is "seven hundred twenty-one million, four hundred eighty-two thousand, five hundred forty".