721945848 has 32 divisors (see below), whose sum is σ = 1943701200. Its totient is φ = 222137088.

The previous prime is 721945787. The next prime is 721945859. The reversal of 721945848 is 848549127.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 721945797 and 721945806.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1156653 + ... + 1157276.

Almost surely, 2^721945848 is an apocalyptic number.

721945848 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

721945848 is an abundant number, since it is smaller than the sum of its proper divisors (1221755352).

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

721945848 is a wasteful number, since it uses less digits than its factorization.

721945848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313951 (or 2313947 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 721945848 is about 26869.0500018144. The cubic root of 721945848 is about 897.0876427056.

The spelling of 721945848 in words is "seven hundred twenty-one million, nine hundred forty-five thousand, eight hundred forty-eight".