628326487 has 4 divisors (see below), whose sum is σ = 630471240. Its totient is φ = 626181736.

The previous prime is 628326481. The next prime is 628326493. The reversal of 628326487 is 784623826.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (628326481) and next prime (628326493).

It is a cyclic number.

It is not a de Polignac number, because 628326487 - 2⁷ = 628326359 is a prime.

It is a super-2 number, since 2×628326487² = 789588348531522338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628326481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071937 + ... + 1072522.

It is an arithmetic number, because the mean of its divisors is an integer number (157617810).

Almost surely, 2^628326487 is an apocalyptic number.

628326487 is a deficient number, since it is larger than the sum of its proper divisors (2144753).

628326487 is a wasteful number, since it uses less digits than its factorization.

628326487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144752.

The product of its digits is 774144, while the sum is 46.

The square root of 628326487 is about 25066.4414506727. The cubic root of 628326487 is about 856.5021469071.

The spelling of 628326487 in words is "six hundred twenty-eight million, three hundred twenty-six thousand, four hundred eighty-seven".