628556247 has 16 divisors (see below), whose sum is σ = 1015848960. Its totient is φ = 380943000.

The previous prime is 628556231. The next prime is 628556263. The reversal of 628556247 is 742655826.

628556247 is a `hidden beast` number, since 6 + 2 + 85 + 562 + 4 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (628556231) and next prime (628556263).

It is not a de Polignac number, because 628556247 - 2⁴ = 628556231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628556287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057879 + ... + 1058472.

It is an arithmetic number, because the mean of its divisors is an integer number (63490560).

Almost surely, 2^628556247 is an apocalyptic number.

628556247 is a deficient number, since it is larger than the sum of its proper divisors (387292713).

628556247 is a wasteful number, since it uses less digits than its factorization.

628556247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116371 (or 2116365 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 628556247 is about 25071.0240516817. The cubic root of 628556247 is about 856.6065331646.

The spelling of 628556247 in words is "six hundred twenty-eight million, five hundred fifty-six thousand, two hundred forty-seven".