721552748 has 24 divisors (see below), whose sum is σ = 1464648192. Its totient is φ = 304620624.

The previous prime is 721552729. The next prime is 721552813. The reversal of 721552748 is 847255127.

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, 190436 + ... + 194187.

It is an arithmetic number, because the mean of its divisors is an integer number (61027008).

Almost surely, 2^721552748 is an apocalyptic number.

It is an amenable number.

721552748 is an abundant number, since it is smaller than the sum of its proper divisors (743095444).

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

721552748 is a wasteful number, since it uses less digits than its factorization.

721552748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384701 (or 384699 counting only the distinct ones).

The product of its digits is 156800, while the sum is 41.

The square root of 721552748 is about 26861.7338978704. The cubic root of 721552748 is about 896.9247915361.

The spelling of 721552748 in words is "seven hundred twenty-one million, five hundred fifty-two thousand, seven hundred forty-eight".