721375458 has 48 divisors (see below), whose sum is σ = 1514970624. Its totient is φ = 228826080.

The previous prime is 721375429. The next prime is 721375513. The reversal of 721375458 is 854573127.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489663 + ... + 491133.

It is an arithmetic number, because the mean of its divisors is an integer number (31561888).

Almost surely, 2^721375458 is an apocalyptic number.

721375458 is an abundant number, since it is smaller than the sum of its proper divisors (793595166).

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

721375458 is a wasteful number, since it uses less digits than its factorization.

721375458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1560 counting only the distinct ones).

The product of its digits is 235200, while the sum is 42.

The square root of 721375458 is about 26858.4336475529. The cubic root of 721375458 is about 896.8513255180.

The spelling of 721375458 in words is "seven hundred twenty-one million, three hundred seventy-five thousand, four hundred fifty-eight".