628709745 has 16 divisors (see below), whose sum is σ = 1012110912. Its totient is φ = 333253440.

The previous prime is 628709717. The next prime is 628709747. The reversal of 628709745 is 547907826.

It is not a de Polignac number, because 628709745 - 2¹⁵ = 628676977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628709694 and 628709703.

It is not an unprimeable number, because it can be changed into a prime (628709747) 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, 126126 + ... + 131015.

It is an arithmetic number, because the mean of its divisors is an integer number (63256932).

Almost surely, 2^628709745 is an apocalyptic number.

It is an amenable number.

628709745 is a deficient number, since it is larger than the sum of its proper divisors (383401167).

628709745 is a wasteful number, since it uses less digits than its factorization.

628709745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257312.

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 628709745 is about 25074.0851278766. The cubic root of 628709745 is about 856.6762573345.

The spelling of 628709745 in words is "six hundred twenty-eight million, seven hundred nine thousand, seven hundred forty-five".