721628676 has 60 divisors (see below), whose sum is σ = 1889287708. Its totient is φ = 240185088.

The previous prime is 721628671. The next prime is 721628681. The reversal of 721628676 is 676826127.

It is an interprime number because it is at equal distance from previous prime (721628671) and next prime (721628681).

It can be written as a sum of positive squares in 2 ways, for example, as 139854276 + 581774400 = 11826^2 + 24120^2 .

It is not an unprimeable number, because it can be changed into a prime (721628671) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 302400 + ... + 304776.

Almost surely, 2^721628676 is an apocalyptic number.

It is an amenable number.

721628676 is an abundant number, since it is smaller than the sum of its proper divisors (1167659032).

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

721628676 is a wasteful number, since it uses less digits than its factorization.

721628676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330 (or 3319 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 721628676 is about 26863.1471722879. The cubic root of 721628676 is about 896.9562511521.

The spelling of 721628676 in words is "seven hundred twenty-one million, six hundred twenty-eight thousand, six hundred seventy-six".