628380681 has 8 divisors (see below), whose sum is σ = 838821984. Its totient is φ = 418429920.

The previous prime is 628380679. The next prime is 628380689. The reversal of 628380681 is 186083826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 628380681 - 2¹ = 628380679 is a prime.

It is a super-2 number, since 2×628380681² = 789724560508047522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628380689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119635 + ... + 124776.

It is an arithmetic number, because the mean of its divisors is an integer number (104852748).

Almost surely, 2^628380681 is an apocalyptic number.

It is an amenable number.

628380681 is a deficient number, since it is larger than the sum of its proper divisors (210441303).

628380681 is a wasteful number, since it uses less digits than its factorization.

628380681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245271.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 628380681 is about 25067.5224344170. The cubic root of 628380681 is about 856.5267710178.

The spelling of 628380681 in words is "six hundred twenty-eight million, three hundred eighty thousand, six hundred eighty-one".