721989848 has 16 divisors (see below), whose sum is σ = 1370868000. Its totient is φ = 356425056.

The previous prime is 721989791. The next prime is 721989857. The reversal of 721989848 is 848989127.

It is a junction number, because it is equal to n+sod(n) for n = 721989793 and 721989802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570563 + ... + 571826.

It is an arithmetic number, because the mean of its divisors is an integer number (85679250).

Almost surely, 2^721989848 is an apocalyptic number.

It is an amenable number.

721989848 is a deficient number, since it is larger than the sum of its proper divisors (648878152).

721989848 is a wasteful number, since it uses less digits than its factorization.

721989848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142474 (or 1142470 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 56.

The square root of 721989848 is about 26869.8687752657. The cubic root of 721989848 is about 897.1058670893.

The spelling of 721989848 in words is "seven hundred twenty-one million, nine hundred eighty-nine thousand, eight hundred forty-eight".