628179025 has 6 divisors (see below), whose sum is σ = 778942022. Its totient is φ = 502543200.

The previous prime is 628179011. The next prime is 628179029. The reversal of 628179025 is 520971826.

It can be written as a sum of positive squares in 3 ways, for example, as 79869969 + 548309056 = 8937^2 + 23416^2 .

It is not a de Polignac number, because 628179025 - 2⁷ = 628178897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628179029) 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 5 ways as a sum of consecutive naturals, for example, 12563556 + ... + 12563605.

Almost surely, 2^628179025 is an apocalyptic number.

It is an amenable number.

628179025 is a deficient number, since it is larger than the sum of its proper divisors (150762997).

628179025 is a wasteful number, since it uses less digits than its factorization.

628179025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25127171 (or 25127166 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 628179025 is about 25063.4998553674. The cubic root of 628179025 is about 856.4351374759.

The spelling of 628179025 in words is "six hundred twenty-eight million, one hundred seventy-nine thousand, twenty-five".