628707 has 4 divisors (see below), whose sum is σ = 838280. Its totient is φ = 419136.

The previous prime is 628699. The next prime is 628709. The reversal of 628707 is 707826.

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

It is not a de Polignac number, because 628707 - 2³ = 628699 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628707.

It is not an unprimeable number, because it can be changed into a prime (628709) 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, 104782 + ... + 104787.

It is an arithmetic number, because the mean of its divisors is an integer number (209570).

2⁶²⁸⁷⁰⁷ is an apocalyptic number.

628707 is a deficient number, since it is larger than the sum of its proper divisors (209573).

628707 is a wasteful number, since it uses less digits than its factorization.

628707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209572.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 628707 is about 792.9104615277. The cubic root of 628707 is about 85.6675010559.

The spelling of 628707 in words is "six hundred twenty-eight thousand, seven hundred seven".